247

247 is the number following 246 and preceding 248. It is an odd number and a pentagonal numberOEIS, Sequence A000326.
== Facts ==
247 is a composite number. It is the thirteenth pentagonal number. Its prime factorization is 13x19. This is the floor of the number of acres in a km^2https://www.metric-conversions.org/area/square-kilometers-to-acres.htm. 247 also resembles the abbreviation 24/7 (24 hours a day, 7 days a week).
== Properties ==
* 247 is a composite number, as it is divisible by 13.
* 247 is a semiprime because it is the product of two prime numbers.
== Sources ==
Category:Numbers 200-299
Category:Numbers with 3 digits