256463407 has 2 divisors, whose sum is σ = 256463408. Its totient is φ = 256463406.

The previous prime is 256463399. The next prime is 256463423. The reversal of 256463407 is 704364652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256463407 - 2³ = 256463399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256463437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128231703 + 128231704.

It is an arithmetic number, because the mean of its divisors is an integer number (128231704).

Almost surely, 2^256463407 is an apocalyptic number.

256463407 is a deficient number, since it is larger than the sum of its proper divisors (1).

256463407 is an equidigital number, since it uses as much as digits as its factorization.

256463407 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 37.

The square root of 256463407 is about 16014.4749211456. The cubic root of 256463407 is about 635.3433214854.

The spelling of 256463407 in words is "two hundred fifty-six million, four hundred sixty-three thousand, four hundred seven".