256355039 has 2 divisors, whose sum is σ = 256355040. Its totient is φ = 256355038.

The previous prime is 256355023. The next prime is 256355051. The reversal of 256355039 is 930553652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256355039 - 2⁴ = 256355023 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 256354993 and 256355011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256355009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128177519 + 128177520.

It is an arithmetic number, because the mean of its divisors is an integer number (128177520).

Almost surely, 2^256355039 is an apocalyptic number.

256355039 is a deficient number, since it is larger than the sum of its proper divisors (1).

256355039 is an equidigital number, since it uses as much as digits as its factorization.

256355039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 121500, while the sum is 38.

The square root of 256355039 is about 16011.0911245924. The cubic root of 256355039 is about 635.2538212773.

The spelling of 256355039 in words is "two hundred fifty-six million, three hundred fifty-five thousand, thirty-nine".