256204667 has 2 divisors, whose sum is σ = 256204668. Its totient is φ = 256204666.

The previous prime is 256204657. The next prime is 256204679. The reversal of 256204667 is 766402652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256204667 - 2⁴ = 256204651 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256204667.

It is not a weakly prime, because it can be changed into another prime (256204657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128102333 + 128102334.

It is an arithmetic number, because the mean of its divisors is an integer number (128102334).

Almost surely, 2^256204667 is an apocalyptic number.

256204667 is a deficient number, since it is larger than the sum of its proper divisors (1).

256204667 is an equidigital number, since it uses as much as digits as its factorization.

256204667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 256204667 is about 16006.3945659227. The cubic root of 256204667 is about 635.1295885315.

The spelling of 256204667 in words is "two hundred fifty-six million, two hundred four thousand, six hundred sixty-seven".