256790893 has 4 divisors (see below), whose sum is σ = 257051008. Its totient is φ = 256530780.

The previous prime is 256790873. The next prime is 256790903. The reversal of 256790893 is 398097652.

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 a de Polignac number, because none of the positive numbers 2^k-256790893 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 (256790803) 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, 128571 + ... + 130552.

It is an arithmetic number, because the mean of its divisors is an integer number (64262752).

Almost surely, 2^256790893 is an apocalyptic number.

It is an amenable number.

256790893 is a deficient number, since it is larger than the sum of its proper divisors (260115).

256790893 is an equidigital number, since it uses as much as digits as its factorization.

256790893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260114.

The product of its (nonzero) digits is 816480, while the sum is 49.

The square root of 256790893 is about 16024.6963465771. The cubic root of 256790893 is about 635.6136362595.

The spelling of 256790893 in words is "two hundred fifty-six million, seven hundred ninety thousand, eight hundred ninety-three".