13662139 has 4 divisors (see below), whose sum is σ = 14031424. Its totient is φ = 13292856.

The previous prime is 13662107. The next prime is 13662149. The reversal of 13662139 is 93126631.

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 13662139 - 2⁵ = 13662107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13662139.

It is not an unprimeable number, because it can be changed into a prime (13662149) 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, 184587 + ... + 184660.

It is an arithmetic number, because the mean of its divisors is an integer number (3507856).

Almost surely, 2^13662139 is an apocalyptic number.

13662139 is a deficient number, since it is larger than the sum of its proper divisors (369285).

13662139 is an equidigital number, since it uses as much as digits as its factorization.

13662139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369284.

The product of its digits is 5832, while the sum is 31.

The square root of 13662139 is about 3696.2330824773. The cubic root of 13662139 is about 239.0596246027.

The spelling of 13662139 in words is "thirteen million, six hundred sixty-two thousand, one hundred thirty-nine".