13621923 has 24 divisors (see below), whose sum is σ = 22583808. Its totient is φ = 7750512.

The previous prime is 13621921. The next prime is 13621943. The reversal of 13621923 is 32912631.

13621923 is a `hidden beast` number, since 13 + 621 + 9 + 23 = 666.

It is not a de Polignac number, because 13621923 - 2¹ = 13621921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13621921) 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, 28936 + ... + 29402.

It is an arithmetic number, because the mean of its divisors is an integer number (940992).

Almost surely, 2^13621923 is an apocalyptic number.

13621923 is a deficient number, since it is larger than the sum of its proper divisors (8961885).

13621923 is a wasteful number, since it uses less digits than its factorization.

13621923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943 (or 940 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 13621923 is about 3690.7889400506. The cubic root of 13621923 is about 238.8248280205.

The spelling of 13621923 in words is "thirteen million, six hundred twenty-one thousand, nine hundred twenty-three".