57871993931 has 2 divisors, whose sum is σ = 57871993932. Its totient is φ = 57871993930.

The previous prime is 57871993859. The next prime is 57871993969. The reversal of 57871993931 is 13939917875.

57871993931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57871993931 - 2¹⁸ = 57871731787 is a prime.

It is a super-2 number, since 2×57871993931² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (57871993331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28935996965 + 28935996966.

It is an arithmetic number, because the mean of its divisors is an integer number (28935996966).

Almost surely, 2^57871993931 is an apocalyptic number.

57871993931 is a deficient number, since it is larger than the sum of its proper divisors (1).

57871993931 is an equidigital number, since it uses as much as digits as its factorization.

57871993931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12859560, while the sum is 62.

The spelling of 57871993931 in words is "fifty-seven billion, eight hundred seventy-one million, nine hundred ninety-three thousand, nine hundred thirty-one".