57855857 has 2 divisors, whose sum is σ = 57855858. Its totient is φ = 57855856.

The previous prime is 57855799. The next prime is 57855869. The reversal of 57855857 is 75855875.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57775201 + 80656 = 7601^2 + 284^2 .

It is a cyclic number.

It is not a de Polignac number, because 57855857 - 2⁸ = 57855601 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57855257) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28927928 + 28927929.

It is an arithmetic number, because the mean of its divisors is an integer number (28927929).

Almost surely, 2^57855857 is an apocalyptic number.

It is an amenable number.

57855857 is a deficient number, since it is larger than the sum of its proper divisors (1).

57855857 is an equidigital number, since it uses as much as digits as its factorization.

57855857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1960000, while the sum is 50.

The square root of 57855857 is about 7606.3037672709. The cubic root of 57855857 is about 386.7667315173.

The spelling of 57855857 in words is "fifty-seven million, eight hundred fifty-five thousand, eight hundred fifty-seven".