256907023 has 4 divisors (see below), whose sum is σ = 258039000. Its totient is φ = 255775048.

The previous prime is 256907017. The next prime is 256907041. The reversal of 256907023 is 320709652.

It is a happy number.

256907023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256907023 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256907023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256907003) 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, 565648 + ... + 566101.

It is an arithmetic number, because the mean of its divisors is an integer number (64509750).

Almost surely, 2^256907023 is an apocalyptic number.

256907023 is a deficient number, since it is larger than the sum of its proper divisors (1131977).

256907023 is a wasteful number, since it uses less digits than its factorization.

256907023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131976.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 256907023 is about 16028.3194066003. The cubic root of 256907023 is about 635.7094375376.

The spelling of 256907023 in words is "two hundred fifty-six million, nine hundred seven thousand, twenty-three".