256939367 has 4 divisors (see below), whose sum is σ = 257311896. Its totient is φ = 256566840.

The previous prime is 256939349. The next prime is 256939369. The reversal of 256939367 is 763939652.

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 256939367 - 2⁶ = 256939303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256939369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185228 + ... + 186609.

It is an arithmetic number, because the mean of its divisors is an integer number (64327974).

Almost surely, 2^256939367 is an apocalyptic number.

256939367 is a deficient number, since it is larger than the sum of its proper divisors (372529).

256939367 is an equidigital number, since it uses as much as digits as its factorization.

256939367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372528.

The product of its digits is 1837080, while the sum is 50.

The square root of 256939367 is about 16029.3283390166. The cubic root of 256939367 is about 635.7361145341.

The spelling of 256939367 in words is "two hundred fifty-six million, nine hundred thirty-nine thousand, three hundred sixty-seven".