256308379 has 2 divisors, whose sum is σ = 256308380. Its totient is φ = 256308378.

The previous prime is 256308359. The next prime is 256308419. The reversal of 256308379 is 973803652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256308379 - 2⁹ = 256307867 is a prime.

It is not a weakly prime, because it can be changed into another prime (256308359) 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, 128154189 + 128154190.

It is an arithmetic number, because the mean of its divisors is an integer number (128154190).

Almost surely, 2^256308379 is an apocalyptic number.

256308379 is a deficient number, since it is larger than the sum of its proper divisors (1).

256308379 is an equidigital number, since it uses as much as digits as its factorization.

256308379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 256308379 is about 16009.6339433480. The cubic root of 256308379 is about 635.2152774125.

The spelling of 256308379 in words is "two hundred fifty-six million, three hundred eight thousand, three hundred seventy-nine".