256046977 has 2 divisors, whose sum is σ = 256046978. Its totient is φ = 256046976.

The previous prime is 256046941. The next prime is 256046981. The reversal of 256046977 is 779640652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167987521 + 88059456 = 12961^2 + 9384^2 .

It is a cyclic number.

It is not a de Polignac number, because 256046977 - 2⁷ = 256046849 is a prime.

It is not a weakly prime, because it can be changed into another prime (256046477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128023488 + 128023489.

It is an arithmetic number, because the mean of its divisors is an integer number (128023489).

Almost surely, 2^256046977 is an apocalyptic number.

It is an amenable number.

256046977 is a deficient number, since it is larger than the sum of its proper divisors (1).

256046977 is an equidigital number, since it uses as much as digits as its factorization.

256046977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 635040, while the sum is 46.

The square root of 256046977 is about 16001.4679639088. The cubic root of 256046977 is about 634.9992576510. Note that the first 3 decimals are identical.

The spelling of 256046977 in words is "two hundred fifty-six million, forty-six thousand, nine hundred seventy-seven".