256748699 has 2 divisors, whose sum is σ = 256748700. Its totient is φ = 256748698.

The previous prime is 256748689. The next prime is 256748719. The reversal of 256748699 is 996847652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256748699 is a prime.

It is not a weakly prime, because it can be changed into another prime (256748669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128374349 + 128374350.

It is an arithmetic number, because the mean of its divisors is an integer number (128374350).

Almost surely, 2^256748699 is an apocalyptic number.

256748699 is a deficient number, since it is larger than the sum of its proper divisors (1).

256748699 is an equidigital number, since it uses as much as digits as its factorization.

256748699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6531840, while the sum is 56.

The square root of 256748699 is about 16023.3797620852. The cubic root of 256748699 is about 635.5788212258.

The spelling of 256748699 in words is "two hundred fifty-six million, seven hundred forty-eight thousand, six hundred ninety-nine".