256897339 has 4 divisors (see below), whose sum is σ = 256986000. Its totient is φ = 256808680.

The previous prime is 256897337. The next prime is 256897379. The reversal of 256897339 is 933798652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 256897339 - 2¹ = 256897337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256897337) 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 in 3 ways as a sum of consecutive naturals, for example, 39832 + ... + 45829.

It is an arithmetic number, because the mean of its divisors is an integer number (64246500).

Almost surely, 2^256897339 is an apocalyptic number.

256897339 is a deficient number, since it is larger than the sum of its proper divisors (88661).

256897339 is an equidigital number, since it uses as much as digits as its factorization.

256897339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88660.

The product of its digits is 2449440, while the sum is 52.

The square root of 256897339 is about 16028.0173134421. The cubic root of 256897339 is about 635.7014498391.

The spelling of 256897339 in words is "two hundred fifty-six million, eight hundred ninety-seven thousand, three hundred thirty-nine".