256560713 has 2 divisors, whose sum is σ = 256560714. Its totient is φ = 256560712.

The previous prime is 256560691. The next prime is 256560721. The reversal of 256560713 is 317065652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153091129 + 103469584 = 12373^2 + 10172^2 .

It is a cyclic number.

It is not a de Polignac number, because 256560713 - 2⁶ = 256560649 is a prime.

It is not a weakly prime, because it can be changed into another prime (256560113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128280356 + 128280357.

It is an arithmetic number, because the mean of its divisors is an integer number (128280357).

Almost surely, 2^256560713 is an apocalyptic number.

It is an amenable number.

256560713 is a deficient number, since it is larger than the sum of its proper divisors (1).

256560713 is an equidigital number, since it uses as much as digits as its factorization.

256560713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 256560713 is about 16017.5126970451. The cubic root of 256560713 is about 635.4236642015.

The spelling of 256560713 in words is "two hundred fifty-six million, five hundred sixty thousand, seven hundred thirteen".