256944713 has 2 divisors, whose sum is σ = 256944714. Its totient is φ = 256944712.

The previous prime is 256944679. The next prime is 256944739. The reversal of 256944713 is 317449652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205865104 + 51079609 = 14348^2 + 7147^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256944713 is a prime.

It is not a weakly prime, because it can be changed into another prime (256944113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128472356 + 128472357.

It is an arithmetic number, because the mean of its divisors is an integer number (128472357).

Almost surely, 2^256944713 is an apocalyptic number.

It is an amenable number.

256944713 is a deficient number, since it is larger than the sum of its proper divisors (1).

256944713 is an equidigital number, since it uses as much as digits as its factorization.

256944713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 41.

The square root of 256944713 is about 16029.4950949804. The cubic root of 256944713 is about 635.7405236440.

The spelling of 256944713 in words is "two hundred fifty-six million, nine hundred forty-four thousand, seven hundred thirteen".