13165623 has 24 divisors (see below), whose sum is σ = 19971120. Its totient is φ = 8346240.

The previous prime is 13165597. The next prime is 13165627. The reversal of 13165623 is 32656131.

13165623 is a `hidden beast` number, since 1 + 3 + 1 + 656 + 2 + 3 = 666.

13165623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13165623 - 2⁸ = 13165367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13165627) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18708 + ... + 19398.

It is an arithmetic number, because the mean of its divisors is an integer number (832130).

Almost surely, 2^13165623 is an apocalyptic number.

13165623 is a deficient number, since it is larger than the sum of its proper divisors (6805497).

13165623 is a wasteful number, since it uses less digits than its factorization.

13165623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799 (or 796 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 13165623 is about 3628.4463617367. The cubic root of 13165623 is about 236.1278094929.

The spelling of 13165623 in words is "thirteen million, one hundred sixty-five thousand, six hundred twenty-three".