13109939 has 4 divisors (see below), whose sum is σ = 13124160. Its totient is φ = 13095720.

The previous prime is 13109909. The next prime is 13109963. The reversal of 13109939 is 93990131.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13109939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13109899 and 13109908.

It is not an unprimeable number, because it can be changed into a prime (13109909) 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, 5624 + ... + 7605.

It is an arithmetic number, because the mean of its divisors is an integer number (3281040).

Almost surely, 2^13109939 is an apocalyptic number.

13109939 is a deficient number, since it is larger than the sum of its proper divisors (14221).

13109939 is an equidigital number, since it uses as much as digits as its factorization.

13109939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14220.

The product of its (nonzero) digits is 6561, while the sum is 35.

The square root of 13109939 is about 3620.7649744218. The cubic root of 13109939 is about 235.7944382103.

The spelling of 13109939 in words is "thirteen million, one hundred nine thousand, nine hundred thirty-nine".