13806139 has 4 divisors (see below), whose sum is σ = 14127256. Its totient is φ = 13485024.

The previous prime is 13806131. The next prime is 13806211. The reversal of 13806139 is 93160831.

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 13806139 - 2³ = 13806131 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 13806139.

It is not an unprimeable number, because it can be changed into a prime (13806131) 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 3 ways as a sum of consecutive naturals, for example, 160494 + ... + 160579.

It is an arithmetic number, because the mean of its divisors is an integer number (3531814).

Almost surely, 2^13806139 is an apocalyptic number.

13806139 is a deficient number, since it is larger than the sum of its proper divisors (321117).

13806139 is an equidigital number, since it uses as much as digits as its factorization.

13806139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321116.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 13806139 is about 3715.6613139521. The cubic root of 13806139 is about 239.8965931838.

The spelling of 13806139 in words is "thirteen million, eight hundred six thousand, one hundred thirty-nine".