256794407 has 2 divisors, whose sum is σ = 256794408. Its totient is φ = 256794406.

The previous prime is 256794403. The next prime is 256794479. The reversal of 256794407 is 704497652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256794407 - 2² = 256794403 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256794403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128397203 + 128397204.

It is an arithmetic number, because the mean of its divisors is an integer number (128397204).

Almost surely, 2^256794407 is an apocalyptic number.

256794407 is a deficient number, since it is larger than the sum of its proper divisors (1).

256794407 is an equidigital number, since it uses as much as digits as its factorization.

256794407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360, while the sum is 44.

The square root of 256794407 is about 16024.8059894652. The cubic root of 256794407 is about 635.6165355525.

The spelling of 256794407 in words is "two hundred fifty-six million, seven hundred ninety-four thousand, four hundred seven".