256704793 has 2 divisors, whose sum is σ = 256704794. Its totient is φ = 256704792.

The previous prime is 256704787. The next prime is 256704803. The reversal of 256704793 is 397407652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 235100889 + 21603904 = 15333^2 + 4648^2 .

It is a cyclic number.

It is not a de Polignac number, because 256704793 - 2²¹ = 254607641 is a prime.

It is a super-3 number, since 3×256704793³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (256704703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128352396 + 128352397.

It is an arithmetic number, because the mean of its divisors is an integer number (128352397).

Almost surely, 2^256704793 is an apocalyptic number.

It is an amenable number.

256704793 is a deficient number, since it is larger than the sum of its proper divisors (1).

256704793 is an equidigital number, since it uses as much as digits as its factorization.

256704793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 317520, while the sum is 43.

The square root of 256704793 is about 16022.0096429880. The cubic root of 256704793 is about 635.5425895400.

The spelling of 256704793 in words is "two hundred fifty-six million, seven hundred four thousand, seven hundred ninety-three".