12656623 has 4 divisors (see below), whose sum is σ = 14464720. Its totient is φ = 10848528.

The previous prime is 12656593. The next prime is 12656629. The reversal of 12656623 is 32665621.

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

It is a cyclic number.

It is not a de Polignac number, because 12656623 - 2⁵ = 12656591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12656629) 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, 904038 + ... + 904051.

It is an arithmetic number, because the mean of its divisors is an integer number (3616180).

Almost surely, 2^12656623 is an apocalyptic number.

12656623 is a deficient number, since it is larger than the sum of its proper divisors (1808097).

12656623 is an equidigital number, since it uses as much as digits as its factorization.

12656623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1808096.

The product of its digits is 12960, while the sum is 31.

The square root of 12656623 is about 3557.6147908395. The cubic root of 12656623 is about 233.0447273023.

The spelling of 12656623 in words is "twelve million, six hundred fifty-six thousand, six hundred twenty-three".