256253489 has 2 divisors, whose sum is σ = 256253490. Its totient is φ = 256253488.

The previous prime is 256253479. The next prime is 256253521. The reversal of 256253489 is 984352652.

256253489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 250683889 + 5569600 = 15833^2 + 2360^2 .

It is a cyclic number.

It is not a de Polignac number, because 256253489 - 2⁸ = 256253233 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (256253429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128126744 + 128126745.

It is an arithmetic number, because the mean of its divisors is an integer number (128126745).

Almost surely, 2^256253489 is an apocalyptic number.

It is an amenable number.

256253489 is a deficient number, since it is larger than the sum of its proper divisors (1).

256253489 is an equidigital number, since it uses as much as digits as its factorization.

256253489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 44.

The square root of 256253489 is about 16007.9195712622. The cubic root of 256253489 is about 635.1699291020.

The spelling of 256253489 in words is "two hundred fifty-six million, two hundred fifty-three thousand, four hundred eighty-nine".