57090931 has 2 divisors, whose sum is σ = 57090932. Its totient is φ = 57090930.

The previous prime is 57090923. The next prime is 57090961. The reversal of 57090931 is 13909075.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57090931 - 2³ = 57090923 is a prime.

It is a super-2 number, since 2×57090931² = 6518748804893522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (57090961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28545465 + 28545466.

It is an arithmetic number, because the mean of its divisors is an integer number (28545466).

Almost surely, 2^57090931 is an apocalyptic number.

57090931 is a deficient number, since it is larger than the sum of its proper divisors (1).

57090931 is an equidigital number, since it uses as much as digits as its factorization.

57090931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8505, while the sum is 34.

The square root of 57090931 is about 7555.8540880565. The cubic root of 57090931 is about 385.0546523865.

The spelling of 57090931 in words is "fifty-seven million, ninety thousand, nine hundred thirty-one".