256944899 has 2 divisors, whose sum is σ = 256944900. Its totient is φ = 256944898.

The previous prime is 256944839. The next prime is 256944907. The reversal of 256944899 is 998449652.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256944899 - 2⁸ = 256944643 is a prime.

It is a super-2 number, since 2×256944899² = 132041362244240402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (256944829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128472449 + 128472450.

It is an arithmetic number, because the mean of its divisors is an integer number (128472450).

Almost surely, 2^256944899 is an apocalyptic number.

256944899 is a deficient number, since it is larger than the sum of its proper divisors (1).

256944899 is an equidigital number, since it uses as much as digits as its factorization.

256944899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5598720, while the sum is 56.

The square root of 256944899 is about 16029.5008967840. The cubic root of 256944899 is about 635.7406770463.

The spelling of 256944899 in words is "two hundred fifty-six million, nine hundred forty-four thousand, eight hundred ninety-nine".