13939109 has 4 divisors (see below), whose sum is σ = 13947360. Its totient is φ = 13930860.

The previous prime is 13939097. The next prime is 13939117. The reversal of 13939109 is 90193931.

It is a happy number.

13939109 is digitally balanced in base 2, 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13939109 - 2¹² = 13935013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13933109) 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, 569 + ... + 5310.

It is an arithmetic number, because the mean of its divisors is an integer number (3486840).

Almost surely, 2^13939109 is an apocalyptic number.

It is an amenable number.

13939109 is a deficient number, since it is larger than the sum of its proper divisors (8251).

13939109 is an equidigital number, since it uses as much as digits as its factorization.

13939109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8250.

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

The square root of 13939109 is about 3733.5116177668. The cubic root of 13939109 is about 240.6642996249.

The spelling of 13939109 in words is "thirteen million, nine hundred thirty-nine thousand, one hundred nine".