256326677 has 2 divisors, whose sum is σ = 256326678. Its totient is φ = 256326676.

The previous prime is 256326649. The next prime is 256326683. The reversal of 256326677 is 776623652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 251349316 + 4977361 = 15854^2 + 2231^2 .

It is a cyclic number.

It is not a de Polignac number, because 256326677 - 2⁶ = 256326613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256326607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128163338 + 128163339.

It is an arithmetic number, because the mean of its divisors is an integer number (128163339).

Almost surely, 2^256326677 is an apocalyptic number.

It is an amenable number.

256326677 is a deficient number, since it is larger than the sum of its proper divisors (1).

256326677 is an equidigital number, since it uses as much as digits as its factorization.

256326677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 44.

The square root of 256326677 is about 16010.2054015556. The cubic root of 256326677 is about 635.2303931787.

The spelling of 256326677 in words is "two hundred fifty-six million, three hundred twenty-six thousand, six hundred seventy-seven".