57386891 has 2 divisors, whose sum is σ = 57386892. Its totient is φ = 57386890.

The previous prime is 57386873. The next prime is 57386893. The reversal of 57386891 is 19868375.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57386891 - 2¹⁸ = 57124747 is a prime.

Together with 57386893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57386893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28693445 + 28693446.

It is an arithmetic number, because the mean of its divisors is an integer number (28693446).

Almost surely, 2^57386891 is an apocalyptic number.

57386891 is a deficient number, since it is larger than the sum of its proper divisors (1).

57386891 is an equidigital number, since it uses as much as digits as its factorization.

57386891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 47.

The square root of 57386891 is about 7575.4135860691. The cubic root of 57386891 is about 385.7188817337.

The spelling of 57386891 in words is "fifty-seven million, three hundred eighty-six thousand, eight hundred ninety-one".