13872939 has 4 divisors (see below), whose sum is σ = 18497256. Its totient is φ = 9248624.

The previous prime is 13872931. The next prime is 13872959. The reversal of 13872939 is 93927831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13872939 - 2³ = 13872931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13872939.

It is not an unprimeable number, because it can be changed into a prime (13872931) 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, 2312154 + ... + 2312159.

It is an arithmetic number, because the mean of its divisors is an integer number (4624314).

Almost surely, 2^13872939 is an apocalyptic number.

13872939 is a deficient number, since it is larger than the sum of its proper divisors (4624317).

13872939 is an equidigital number, since it uses as much as digits as its factorization.

13872939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4624316.

The product of its digits is 81648, while the sum is 42.

The square root of 13872939 is about 3724.6394456377. The cubic root of 13872939 is about 240.2828782574.

The spelling of 13872939 in words is "thirteen million, eight hundred seventy-two thousand, nine hundred thirty-nine".