57568813 has 2 divisors, whose sum is σ = 57568814. Its totient is φ = 57568812.

The previous prime is 57568807. The next prime is 57568871. The reversal of 57568813 is 31886575.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36747844 + 20820969 = 6062^2 + 4563^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57568813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57568813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57568213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28784406 + 28784407.

It is an arithmetic number, because the mean of its divisors is an integer number (28784407).

Almost surely, 2^57568813 is an apocalyptic number.

It is an amenable number.

57568813 is a deficient number, since it is larger than the sum of its proper divisors (1).

57568813 is an equidigital number, since it uses as much as digits as its factorization.

57568813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 43.

The square root of 57568813 is about 7587.4114821855. The cubic root of 57568813 is about 386.1260405240.

It can be divided in two parts, 5756 and 8813, that multiplied together give a triangular number (50727628 = T₁₀₀₇₂).

The spelling of 57568813 in words is "fifty-seven million, five hundred sixty-eight thousand, eight hundred thirteen".