13981924 has 12 divisors (see below), whose sum is σ = 26692848. Its totient is φ = 6355400.

The previous prime is 13981921. The next prime is 13981927. The reversal of 13981924 is 42918931.

13981924 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13981921) and next prime (13981927).

It is not an unprimeable number, because it can be changed into a prime (13981921) 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, 158842 + ... + 158929.

It is an arithmetic number, because the mean of its divisors is an integer number (2224404).

Almost surely, 2^13981924 is an apocalyptic number.

It is an amenable number.

13981924 is a deficient number, since it is larger than the sum of its proper divisors (12710924).

13981924 is a wasteful number, since it uses less digits than its factorization.

13981924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317786 (or 317784 counting only the distinct ones).

The product of its digits is 15552, while the sum is 37.

The square root of 13981924 is about 3739.2410994746. The cubic root of 13981924 is about 240.9104538106.

The spelling of 13981924 in words is "thirteen million, nine hundred eighty-one thousand, nine hundred twenty-four".