256487579 has 2 divisors, whose sum is σ = 256487580. Its totient is φ = 256487578.

The previous prime is 256487563. The next prime is 256487611. The reversal of 256487579 is 975784652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256487579 - 2⁴ = 256487563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256487579.

It is not a weakly prime, because it can be changed into another prime (256487879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128243789 + 128243790.

It is an arithmetic number, because the mean of its divisors is an integer number (128243790).

Almost surely, 2^256487579 is an apocalyptic number.

256487579 is a deficient number, since it is larger than the sum of its proper divisors (1).

256487579 is an equidigital number, since it uses as much as digits as its factorization.

256487579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4233600, while the sum is 53.

The square root of 256487579 is about 16015.2295956068. The cubic root of 256487579 is about 635.3632814951.

The spelling of 256487579 in words is "two hundred fifty-six million, four hundred eighty-seven thousand, five hundred seventy-nine".