497951991 has 6 divisors (see below), whose sum is σ = 719264000. Its totient is φ = 331967988.

The previous prime is 497951983. The next prime is 497952041. The reversal of 497951991 is 199159794.

It is not a de Polignac number, because 497951991 - 2³ = 497951983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (497951491) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27663991 + ... + 27664008.

Almost surely, 2^497951991 is an apocalyptic number.

497951991 is a deficient number, since it is larger than the sum of its proper divisors (221312009).

497951991 is a wasteful number, since it uses less digits than its factorization.

497951991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55328005 (or 55328002 counting only the distinct ones).

The product of its digits is 918540, while the sum is 54.

The square root of 497951991 is about 22314.8379111299. The cubic root of 497951991 is about 792.6153724830.

The spelling of 497951991 in words is "four hundred ninety-seven million, nine hundred fifty-one thousand, nine hundred ninety-one".