57316387 has 2 divisors, whose sum is σ = 57316388. Its totient is φ = 57316386.

The previous prime is 57316381. The next prime is 57316403. The reversal of 57316387 is 78361375.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57316387 - 2²³ = 48927779 is a prime.

It is not a weakly prime, because it can be changed into another prime (57316381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28658193 + 28658194.

It is an arithmetic number, because the mean of its divisors is an integer number (28658194).

Almost surely, 2^57316387 is an apocalyptic number.

57316387 is a deficient number, since it is larger than the sum of its proper divisors (1).

57316387 is an equidigital number, since it uses as much as digits as its factorization.

57316387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 40.

The square root of 57316387 is about 7570.7586806079. The cubic root of 57316387 is about 385.5608556987.

The spelling of 57316387 in words is "fifty-seven million, three hundred sixteen thousand, three hundred eighty-seven".