256414889 has 2 divisors, whose sum is σ = 256414890. Its totient is φ = 256414888.

The previous prime is 256414853. The next prime is 256414913. The reversal of 256414889 is 988414652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216825625 + 39589264 = 14725^2 + 6292^2 .

It is a cyclic number.

It is not a de Polignac number, because 256414889 - 2¹² = 256410793 is a prime.

It is not a weakly prime, because it can be changed into another prime (256414819) 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, 128207444 + 128207445.

It is an arithmetic number, because the mean of its divisors is an integer number (128207445).

Almost surely, 2^256414889 is an apocalyptic number.

It is an amenable number.

256414889 is a deficient number, since it is larger than the sum of its proper divisors (1).

256414889 is an equidigital number, since it uses as much as digits as its factorization.

256414889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 552960, while the sum is 47.

The square root of 256414889 is about 16012.9600324237. The cubic root of 256414889 is about 635.3032540001.

The spelling of 256414889 in words is "two hundred fifty-six million, four hundred fourteen thousand, eight hundred eighty-nine".