500686731 has 16 divisors (see below), whose sum is σ = 743202720. Its totient is φ = 333141120.

The previous prime is 500686721. The next prime is 500686751. The reversal of 500686731 is 137686005.

500686731 is a `hidden beast` number, since 500 + 6 + 86 + 73 + 1 = 666.

It is not a de Polignac number, because 500686731 - 2⁵ = 500686699 is a prime.

It is a super-2 number, since 2×500686731² = 501374405198932722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (500686721) 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, 3730 + ... + 31863.

It is an arithmetic number, because the mean of its divisors is an integer number (46450170).

Almost surely, 2^500686731 is an apocalyptic number.

500686731 is a deficient number, since it is larger than the sum of its proper divisors (242515989).

500686731 is a wasteful number, since it uses less digits than its factorization.

500686731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36123 (or 36117 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 500686731 is about 22376.0302779559. The cubic root of 500686731 is about 794.0637322554.

The spelling of 500686731 in words is "five hundred million, six hundred eighty-six thousand, seven hundred thirty-one".