13479139 has 4 divisors (see below), whose sum is σ = 13630680. Its totient is φ = 13327600.

The previous prime is 13479133. The next prime is 13479143. The reversal of 13479139 is 93197431.

13479139 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 13479139 - 2⁵ = 13479107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13479098 and 13479107.

It is not an unprimeable number, because it can be changed into a prime (13479133) 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, 75637 + ... + 75814.

It is an arithmetic number, because the mean of its divisors is an integer number (3407670).

Almost surely, 2^13479139 is an apocalyptic number.

13479139 is a deficient number, since it is larger than the sum of its proper divisors (151541).

13479139 is an equidigital number, since it uses as much as digits as its factorization.

13479139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151540.

The product of its digits is 20412, while the sum is 37.

The square root of 13479139 is about 3671.3946941183. The cubic root of 13479139 is about 237.9874472583.

The spelling of 13479139 in words is "thirteen million, four hundred seventy-nine thousand, one hundred thirty-nine".