797

797 is a prime number.

797 is a left- and right-trunctable prime number that yields the primes 7, 79, and 97.

797 is the smallest number and the smallest prime n such that googol - n is prime.

797 is the number of functional graphs on 9 vertices.

797 has a representation as a sum of two squares: 797 = 11² + 26².

797 is the hypotenuse of a primitive Pythagorean triple: 797² = 555² + 572².

797 is 665 in base 11 and 565 in base 12. It is 494 in base 13.

Source: Number Gossip