#include <bits/stdc++.h>
using namespace std;

#ifdef _WIN32
#define scanfll(x) scanf("%I64d", x)
#define printfll(x) printf("%I64d", x)
#else
#define scanfll(x) scanf("%lld", x)
#define printfll(x) printf("%lld", x)
#endif
#define rep(i,n) for(long long i = 0; i < (long long)(n); i++)
#define repi(i,a,b) for(long long i = (long long)(a); i < (long long)(b); i++)
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define fi first
#define se second
#define mt make_tuple
#define mp make_pair
template<class T1, class T2> bool chmin(T1 &a, T2 b) { return b < a && (a = b, true); }
template<class T1, class T2> bool chmax(T1 &a, T2 b) { return a < b && (a = b, true); }

using ll = long long; using ld = long double; using vll = vector<ll>; using vvll = vector<vll>; using vld = vector<ld>; 
using vi = vector<int>; using vvi = vector<vi>;
vll conv(vi& v) { vll r(v.size()); rep(i, v.size()) r[i] = v[i]; return r; }
using P = pair<ll, ll>;

template <typename T, typename U> ostream &operator<<(ostream &o, const pair<T, U> &v) {  o << "(" << v.first << ", " << v.second << ")"; return o; }
template<size_t...> struct seq{}; template<size_t N, size_t... Is> struct gen_seq : gen_seq<N-1, N-1, Is...>{}; template<size_t... Is> struct gen_seq<0, Is...> : seq<Is...>{};
template<class Ch, class Tr, class Tuple, size_t... Is>
void print_tuple(basic_ostream<Ch,Tr>& os, Tuple const& t, seq<Is...>){ using s = int[]; (void)s{0, (void(os << (Is == 0? "" : ", ") << get<Is>(t)), 0)...}; }
template<class Ch, class Tr, class... Args> 
auto operator<<(basic_ostream<Ch, Tr>& os, tuple<Args...> const& t) -> basic_ostream<Ch, Tr>& { os << "("; print_tuple(os, t, gen_seq<sizeof...(Args)>()); return os << ")"; }
ostream &operator<<(ostream &o, const vvll &v) { rep(i, v.size()) { rep(j, v[i].size()) o << v[i][j] << " "; cout << endl; } return o; }
template <typename T> ostream &operator<<(ostream &o, const vector<T> &v) { o << '['; rep(i, v.size()) o << v[i] << (i != v.size()-1 ? ", " : ""); o << "]";  return o; }
template <typename T>  ostream &operator<<(ostream &o, const set<T> &m) { o << '['; for (auto it = m.begin(); it != m.end(); it++) o << *it << (next(it) != m.end() ? ", " : ""); o << "]";  return o; }
template <typename T, typename U>  ostream &operator<<(ostream &o, const map<T, U> &m) { o << '['; for (auto it = m.begin(); it != m.end(); it++) o << *it << (next(it) != m.end() ? ", " : ""); o << "]";  return o; }
template <typename T, typename U>  ostream &operator<<(ostream &o, const unordered_map<T, U> &m) { o << '['; for (auto it = m.begin(); it != m.end(); it++) o << *it; o << "]";  return o; }
void printbits(ll mask, ll n) { rep(i, n) { cout << !!(mask & (1ll << i)); } cout << endl; }
#define ldout fixed << setprecision(40) 

static const double EPS = 1e-14;
static const long long mo = 1e9+7;

/***********************/
// ??±?????¨???
/***********************/
#define FOR(i,c) for(__typeof((c).begin())i=(c).begin();i!=(c).end();++i)

typedef long long Weight;
const Weight INF = 1e18;

struct Edge {
    ll src, dst;
    Weight weight;
    Edge(ll src, ll dst, Weight weight) :
        src(src), dst(dst), weight(weight) { }
};
bool operator < (const Edge &e, const Edge &f) {
    return e.weight != f.weight ? e.weight > f.weight : // !!INVERSE!!
        e.src != f.src ? e.src < f.src : e.dst < f.dst;
}
typedef vector<Edge> Edges;
typedef vector<Edges> Graph;

typedef vector<Weight> Array;
typedef vector<Array> Matrix;

void addDirected(Graph& g, ll src, ll dst, Weight weight) { assert(src < g.size() && src >= 0 && dst < g.size() && dst >= 0); g[src].push_back(Edge(src, dst, weight)); }
void addUndirected(Graph& g, ll src, ll dst, Weight weight) { assert(src < g.size() && src >= 0 && dst < g.size() && dst >= 0); g[src].push_back(Edge(src, dst, weight)); g[dst].push_back(Edge(dst, src, weight)); }
void addDirected(Graph& g, ll src, ll dst) { addDirected(g, src, dst, 1); }
void addUndirected(Graph& g, ll src, ll dst) { addUndirected(g, src, dst, 1); }
void printGraph(Graph& g) {
    rep(i, g.size()) {
        if (!g[i].size())
            continue;
        rep(j, g[i].size()) 
            cout << "(" << i << ", " << g[i][j].dst << "), ";
        cout << endl;
    }
}

// ?????£???????§£
// O(V+E)
// const Graph& g               ????????°??????
// vector< vector<ll> >& scc   ??°??????????????£?????????
void visitStronglyConnectedComponents(const Graph &g, ll v, vector< vector<ll> >& scc,
        stack<ll> &S, vector<bool> &inS,
        vector<ll> &low, vector<ll> &num, ll& time) {
    low[v] = num[v] = ++time;
    S.push(v); inS[v] = true;
    FOR(e, g[v]) {
        ll w = e->dst;
        if (num[w] == 0) {
            visitStronglyConnectedComponents(g, w, scc, S, inS, low, num, time);
            low[v] = min(low[v], low[w]);
        } else if (inS[w])
            low[v] = min(low[v], num[w]);
    }
    if (low[v] == num[v]) {
        scc.push_back(vector<ll>());
        while (1) {
            ll w = S.top(); S.pop(); inS[w] = false;
            scc.back().push_back(w);
            if (v == w) break;
        }
    }
}
void stronglyConnectedComponents(const Graph& g, vector< vector<ll> >& scc) {
    const ll n = g.size();
    vector<ll> num(n), low(n);
    stack<ll> S;
    vector<bool> inS(n);
    ll time = 0;
    rep(u, n) if (num[u] == 0)
        visitStronglyConnectedComponents(g, u, scc, S, inS, low, num, time);
}

// ???????????????????????????
// ????????????????????? u ??§?????£??????u[i] ?????? u[j] ??????????????? => i < j ?????????????????????????????????
//
// const Graph &g
// ??°?????????
// vector<int> &order
// ???????????????????????????????????????????????¨??§??£??\???????????????????????????????????? true ?????¨???????????????
// ?????????
// ????????????????????????????????????????????????
//
// O(V+E)
bool visitT(const Graph &g, ll v, vector<ll> &order, vector<ll> &color) {
    color[v] = 1;
    FOR(e, g[v]) {
        if (color[e->dst] == 2) continue;
        if (color[e->dst] == 1) return false;
        if (!visitT(g, e->dst, order, color)) return false;
    }
    order.push_back(v); color[v] = 2;
    return true;
}
bool topologicalSort(const Graph &g, vector<ll> &order) {
    ll n = g.size();
    vector<ll> color(n);
    rep(u, n) if (!color[u] && !visitT(g, u, order, color))
        return false;
    reverse(all(order));
    return true;
}

// ???????????°???????????????
void reverseGraph(Graph& g_dst, Graph& g_src) { /*g_dst??????graph?????????*/
    g_dst = Graph(g_src.size());
    rep(i, g_src.size()) {
        rep(j, g_src[i].size()) {
            addDirected(g_dst, g_src[i][j].dst, g_src[i][j].src, g_src[i][j].weight);
        }
    }
}

int main(void) {
    cin.tie(0); ios::sync_with_stdio(false);
    ll n, m; cin >> n >> m;
    Graph g = Graph(n);
    rep(i, m) {
        ll u, v; cin >> u >> v; u--, v--;
        addDirected(g, u, v);
    }

    // ??????????????°?????????????????????
    vector<vector<ll>> scc;
    stronglyConnectedComponents(g, scc);

    // ?????????????????????SCC????±????????????????
    vector<ll> scc_inv(g.size());
    rep(i, scc.size()) rep(j, scc[i].size()) scc_inv[scc[i][j]] = i;

    // ??°??????DAG?????°????????????
    // ??°??????dag?????????i??????????????????(vector<ll> scc[i])???????????¨???????????????
    Graph dag(scc.size());
    rep(from, g.size()) rep(to, g[from].size()) if (scc_inv[from] != scc_inv[g[from][to].dst]) {
        addDirected(dag, scc_inv[from], scc_inv[g[from][to].dst]);
    }

    // ????????????????????????????????????
    // ????????????????????¨??§????????¢????????°??§?????????????????????
    vector<ll> order;
    topologicalSort(dag, order);
    reverse(all(order));

    // ??????????????????????????????????????????????????????
    // ?????????????????????????????????????????????????????????????????\??????????????§????????°??????????§??????????
    Graph dag_rev;
    reverseGraph(dag_rev, dag);

    // dp[i]: ??????i???????????¨?????????????????????????????????????????????
    vll dp(dag.size(), -1);
    function<ll(ll)> f = [&](ll i){
        if (dp[i] != -1)
            return dp[i];
        dp[i] = 1;
        rep(j, dag_rev[i].size()) {
            (dp[i] *= f(dag_rev[i][j].dst) + 1) %= mo;
        }
        return dp[i];
    };

    // ??????????????????????????????????????????????????§???
    // ???????????????????????£?????????????????????????????????????????£???????????????????????¨?????????
    ll ret = 1;
    rep(i, dag.size()) {
        if (dp[order[i]] != -1) 
            continue;
        (ret *= f(order[i]) + 1) %= mo;
    }
    cout << ret << endl;

    return 0;
}

Measured memory_bytes: 3440