Table schema:
CREATE TABLE table_name_29 (overs INTEGER, economy_rate VARCHAR, team VARCHAR, best_bowling VARCHAR)

Question: What is the lowest overs of the Chennai Super Kings when the Economy Rate is less than 5.92 with a Best Bowling number of 2/17?
SQL: SELECT MIN(overs) FROM table_name_29 WHERE team = "chennai super kings" AND best_bowling = "2/17" AND economy_rate < 5.92