256034869 has 2 divisors, whose sum is σ = 256034870. Its totient is φ = 256034868.

The previous prime is 256034839. The next prime is 256034879. The reversal of 256034869 is 968430652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170694225 + 85340644 = 13065^2 + 9238^2 .

It is a cyclic number.

It is not a de Polignac number, because 256034869 - 2⁷ = 256034741 is a prime.

It is a super-2 number, since 2×256034869² = 131107708287694322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256034839) 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, 128017434 + 128017435.

It is an arithmetic number, because the mean of its divisors is an integer number (128017435).

Almost surely, 2^256034869 is an apocalyptic number.

It is an amenable number.

256034869 is a deficient number, since it is larger than the sum of its proper divisors (1).

256034869 is an equidigital number, since it uses as much as digits as its factorization.

256034869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 256034869 is about 16001.0896191478. The cubic root of 256034869 is about 634.9892481698.

The spelling of 256034869 in words is "two hundred fifty-six million, thirty-four thousand, eight hundred sixty-nine".