57056689 has 2 divisors, whose sum is σ = 57056690. Its totient is φ = 57056688.

The previous prime is 57056687. The next prime is 57056693. The reversal of 57056689 is 98665075.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48762289 + 8294400 = 6983^2 + 2880^2 .

It is a cyclic number.

It is not a de Polignac number, because 57056689 - 2¹ = 57056687 is a prime.

Together with 57056687, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (57056687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28528344 + 28528345.

It is an arithmetic number, because the mean of its divisors is an integer number (28528345).

Almost surely, 2^57056689 is an apocalyptic number.

It is an amenable number.

57056689 is a deficient number, since it is larger than the sum of its proper divisors (1).

57056689 is an equidigital number, since it uses as much as digits as its factorization.

57056689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453600, while the sum is 46.

The square root of 57056689 is about 7553.5878230150. The cubic root of 57056689 is about 384.9776542942.

The spelling of 57056689 in words is "fifty-seven million, fifty-six thousand, six hundred eighty-nine".