57640867 has 2 divisors, whose sum is σ = 57640868. Its totient is φ = 57640866.

The previous prime is 57640861. The next prime is 57640871. The reversal of 57640867 is 76804675.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57640867 - 2³ = 57640859 is a prime.

It is not a weakly prime, because it can be changed into another prime (57640861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28820433 + 28820434.

It is an arithmetic number, because the mean of its divisors is an integer number (28820434).

Almost surely, 2^57640867 is an apocalyptic number.

57640867 is a deficient number, since it is larger than the sum of its proper divisors (1).

57640867 is an equidigital number, since it uses as much as digits as its factorization.

57640867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 57640867 is about 7592.1582570439. The cubic root of 57640867 is about 386.2870670990.

The spelling of 57640867 in words is "fifty-seven million, six hundred forty thousand, eight hundred sixty-seven".