256490359 has 2 divisors, whose sum is σ = 256490360. Its totient is φ = 256490358.

The previous prime is 256490323. The next prime is 256490387. The reversal of 256490359 is 953094652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256490359 - 2⁷ = 256490231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256490459) 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, 128245179 + 128245180.

It is an arithmetic number, because the mean of its divisors is an integer number (128245180).

Almost surely, 2^256490359 is an apocalyptic number.

256490359 is a deficient number, since it is larger than the sum of its proper divisors (1).

256490359 is an equidigital number, since it uses as much as digits as its factorization.

256490359 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 43.

The square root of 256490359 is about 16015.3163877583. The cubic root of 256490359 is about 635.3655769975.

The spelling of 256490359 in words is "two hundred fifty-six million, four hundred ninety thousand, three hundred fifty-nine".