497

497 = 7 x 71.

497 is the maximum number of regions into which 31 lines divide a plane (A000124).

497 is the number of graphs with 8 edges.

497 is the sum of five consecutive primes: 497 = 89 + 97 + 101 + 103 + 107.

497 is 232 in base 15.

The sum of the divisors of 497 is a square (A006532): 1 + 7 + 71 + 497 = 576 = 24².

497 and its reversal, 794, are distinct semiprimes (A097393).

Source: What's Special About This Number?