56640613 has 2 divisors, whose sum is σ = 56640614. Its totient is φ = 56640612.

The previous prime is 56640607. The next prime is 56640637. The reversal of 56640613 is 31604665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37429924 + 19210689 = 6118^2 + 4383^2 .

It is a cyclic number.

It is not a de Polignac number, because 56640613 - 2⁵ = 56640581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56640643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28320306 + 28320307.

It is an arithmetic number, because the mean of its divisors is an integer number (28320307).

Almost surely, 2^56640613 is an apocalyptic number.

It is an amenable number.

56640613 is a deficient number, since it is larger than the sum of its proper divisors (1).

56640613 is an equidigital number, since it uses as much as digits as its factorization.

56640613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 56640613 is about 7525.9958145085. The cubic root of 56640613 is about 384.0395760896.

The spelling of 56640613 in words is "fifty-six million, six hundred forty thousand, six hundred thirteen".