57731887 has 2 divisors, whose sum is σ = 57731888. Its totient is φ = 57731886.

The previous prime is 57731873. The next prime is 57731917. The reversal of 57731887 is 78813775.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57731887 - 2⁷ = 57731759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57701887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28865943 + 28865944.

It is an arithmetic number, because the mean of its divisors is an integer number (28865944).

Almost surely, 2^57731887 is an apocalyptic number.

57731887 is a deficient number, since it is larger than the sum of its proper divisors (1).

57731887 is an equidigital number, since it uses as much as digits as its factorization.

57731887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 329280, while the sum is 46.

The square root of 57731887 is about 7598.1502354191. The cubic root of 57731887 is about 386.4902872566.

The spelling of 57731887 in words is "fifty-seven million, seven hundred thirty-one thousand, eight hundred eighty-seven".