497991537 has 16 divisors (see below), whose sum is σ = 739706880. Its totient is φ = 331120656.

The previous prime is 497991493. The next prime is 497991553. The reversal of 497991537 is 735199794.

It is a happy number.

It is not a de Polignac number, because 497991537 - 2⁸ = 497991281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (497991337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13738 + ... + 34419.

It is an arithmetic number, because the mean of its divisors is an integer number (46231680).

Almost surely, 2^497991537 is an apocalyptic number.

It is an amenable number.

497991537 is a deficient number, since it is larger than the sum of its proper divisors (241715343).

497991537 is a wasteful number, since it uses less digits than its factorization.

497991537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48549 (or 48543 counting only the distinct ones).

The product of its digits is 2143260, while the sum is 54.

The square root of 497991537 is about 22315.7239855668. The cubic root of 497991537 is about 792.6363543837.

The spelling of 497991537 in words is "four hundred ninety-seven million, nine hundred ninety-one thousand, five hundred thirty-seven".