23656137 has 4 divisors (see below), whose sum is σ = 31541520. Its totient is φ = 15770756.

The previous prime is 23656133. The next prime is 23656147. The reversal of 23656137 is 73165632.

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 not a de Polignac number, because 23656137 - 2² = 23656133 is a prime.

It is a super-2 number, since 2×23656137² = 1119225635525538, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23656098 and 23656107.

It is not an unprimeable number, because it can be changed into a prime (23656133) 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, 3942687 + ... + 3942692.

It is an arithmetic number, because the mean of its divisors is an integer number (7885380).

Almost surely, 2^23656137 is an apocalyptic number.

It is an amenable number.

23656137 is a deficient number, since it is larger than the sum of its proper divisors (7885383).

23656137 is an equidigital number, since it uses as much as digits as its factorization.

23656137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7885382.

The product of its digits is 22680, while the sum is 33.

The square root of 23656137 is about 4863.7574980667. The cubic root of 23656137 is about 287.0656812043.

The spelling of 23656137 in words is "twenty-three million, six hundred fifty-six thousand, one hundred thirty-seven".