13991324 has 12 divisors (see below), whose sum is σ = 24672648. Its totient is φ = 6942000.

The previous prime is 13991309. The next prime is 13991333. The reversal of 13991324 is 42319931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12827 + ... + 13874.

It is an arithmetic number, because the mean of its divisors is an integer number (2056054).

Almost surely, 2^13991324 is an apocalyptic number.

It is an amenable number.

13991324 is a deficient number, since it is larger than the sum of its proper divisors (10681324).

13991324 is a wasteful number, since it uses less digits than its factorization.

13991324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26836 (or 26834 counting only the distinct ones).

The product of its digits is 5832, while the sum is 32.

The square root of 13991324 is about 3740.4978278299. The cubic root of 13991324 is about 240.9644294764.

The spelling of 13991324 in words is "thirteen million, nine hundred ninety-one thousand, three hundred twenty-four".