256632937 has 4 divisors (see below), whose sum is σ = 279963216. Its totient is φ = 233302660.

The previous prime is 256632931. The next prime is 256632941. The reversal of 256632937 is 739236652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256632937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256632893 and 256632902.

It is not an unprimeable number, because it can be changed into a prime (256632931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11665123 + ... + 11665144.

It is an arithmetic number, because the mean of its divisors is an integer number (69990804).

Almost surely, 2^256632937 is an apocalyptic number.

It is an amenable number.

256632937 is a deficient number, since it is larger than the sum of its proper divisors (23330279).

256632937 is a wasteful number, since it uses less digits than its factorization.

256632937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23330278.

The product of its digits is 408240, while the sum is 43.

The square root of 256632937 is about 16019.7670707161. The cubic root of 256632937 is about 635.4832843104.

The spelling of 256632937 in words is "two hundred fifty-six million, six hundred thirty-two thousand, nine hundred thirty-seven".