503985931 has 2 divisors, whose sum is σ = 503985932. Its totient is φ = 503985930.

The previous prime is 503985883. The next prime is 503985967. The reversal of 503985931 is 139589305.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 503985931 - 2⁷ = 503985803 is a prime.

It is a super-2 number, since 2×503985931² = 508003637291873522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (503985331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251992965 + 251992966.

It is an arithmetic number, because the mean of its divisors is an integer number (251992966).

Almost surely, 2^503985931 is an apocalyptic number.

503985931 is a deficient number, since it is larger than the sum of its proper divisors (1).

503985931 is an equidigital number, since it uses as much as digits as its factorization.

503985931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145800, while the sum is 43.

The square root of 503985931 is about 22449.6309769225. The cubic root of 503985931 is about 795.8040365691.

The spelling of 503985931 in words is "five hundred three million, nine hundred eighty-five thousand, nine hundred thirty-one".