256704323 has 2 divisors, whose sum is σ = 256704324. Its totient is φ = 256704322.

The previous prime is 256704319. The next prime is 256704341. The reversal of 256704323 is 323407652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256704323 - 2² = 256704319 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256704323.

It is not a weakly prime, because it can be changed into another prime (256704223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128352161 + 128352162.

It is an arithmetic number, because the mean of its divisors is an integer number (128352162).

Almost surely, 2^256704323 is an apocalyptic number.

256704323 is a deficient number, since it is larger than the sum of its proper divisors (1).

256704323 is an equidigital number, since it uses as much as digits as its factorization.

256704323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 32.

The square root of 256704323 is about 16021.9949756577. The cubic root of 256704323 is about 635.5422016688.

The spelling of 256704323 in words is "two hundred fifty-six million, seven hundred four thousand, three hundred twenty-three".