256975907 has 8 divisors (see below), whose sum is σ = 258561600. Its totient is φ = 255394944.

The previous prime is 256975897. The next prime is 256975921. The reversal of 256975907 is 709579652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256975907 - 2⁴ = 256975891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256975937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197483 + ... + 198779.

It is an arithmetic number, because the mean of its divisors is an integer number (32320200).

Almost surely, 2^256975907 is an apocalyptic number.

256975907 is a deficient number, since it is larger than the sum of its proper divisors (1585693).

256975907 is a wasteful number, since it uses less digits than its factorization.

256975907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2365.

The product of its (nonzero) digits is 1190700, while the sum is 50.

The square root of 256975907 is about 16030.4680842451. The cubic root of 256975907 is about 635.7662496548.

The spelling of 256975907 in words is "two hundred fifty-six million, nine hundred seventy-five thousand, nine hundred seven".