256944893 has 4 divisors (see below), whose sum is σ = 260197440. Its totient is φ = 253692348.

The previous prime is 256944839. The next prime is 256944899. The reversal of 256944893 is 398449652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 256944893 - 2⁶ = 256944829 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 (256944899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1626155 + ... + 1626312.

It is an arithmetic number, because the mean of its divisors is an integer number (65049360).

Almost surely, 2^256944893 is an apocalyptic number.

It is an amenable number.

256944893 is a deficient number, since it is larger than the sum of its proper divisors (3252547).

256944893 is an equidigital number, since it uses as much as digits as its factorization.

256944893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3252546.

The product of its digits is 1866240, while the sum is 50.

The square root of 256944893 is about 16029.5007096291. The cubic root of 256944893 is about 635.7406720978.

The spelling of 256944893 in words is "two hundred fifty-six million, nine hundred forty-four thousand, eight hundred ninety-three".