13872139 has 8 divisors (see below), whose sum is σ = 14192640. Its totient is φ = 13554600.

The previous prime is 13872137. The next prime is 13872169. The reversal of 13872139 is 93127831.

13872139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13872139 - 2¹ = 13872137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13872137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10654 + ... + 11884.

It is an arithmetic number, because the mean of its divisors is an integer number (1774080).

Almost surely, 2^13872139 is an apocalyptic number.

13872139 is a deficient number, since it is larger than the sum of its proper divisors (320501).

13872139 is a wasteful number, since it uses less digits than its factorization.

13872139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481.

The product of its digits is 9072, while the sum is 34.

The square root of 13872139 is about 3724.5320511441. The cubic root of 13872139 is about 240.2782594333.

The spelling of 13872139 in words is "thirteen million, eight hundred seventy-two thousand, one hundred thirty-nine".