123656623 has 8 divisors (see below), whose sum is σ = 132228720. Its totient is φ = 115228800.

The previous prime is 123656591. The next prime is 123656629. The reversal of 123656623 is 326656321.

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 123656623 - 2⁵ = 123656591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123656629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34293 + ... + 37726.

It is an arithmetic number, because the mean of its divisors is an integer number (16528590).

Almost surely, 2^123656623 is an apocalyptic number.

123656623 is a deficient number, since it is larger than the sum of its proper divisors (8572097).

123656623 is a wasteful number, since it uses less digits than its factorization.

123656623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72137.

The product of its digits is 38880, while the sum is 34.

The square root of 123656623 is about 11120.0999545867. The cubic root of 123656623 is about 498.2023755043.

The spelling of 123656623 in words is "one hundred twenty-three million, six hundred fifty-six thousand, six hundred twenty-three".