13972239 has 24 divisors (see below), whose sum is σ = 21481200. Its totient is φ = 8726400.

The previous prime is 13972237. The next prime is 13972243. The reversal of 13972239 is 93227931.

It is not a de Polignac number, because 13972239 - 2¹ = 13972237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13972237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16867 + ... + 17675.

It is an arithmetic number, because the mean of its divisors is an integer number (895050).

Almost surely, 2^13972239 is an apocalyptic number.

13972239 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

13972239 is a deficient number, since it is larger than the sum of its proper divisors (7508961).

13972239 is a wasteful number, since it uses less digits than its factorization.

13972239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935 (or 932 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 13972239 is about 3737.9458262527. The cubic root of 13972239 is about 240.8548163396.

The spelling of 13972239 in words is "thirteen million, nine hundred seventy-two thousand, two hundred thirty-nine".