13117939 has 4 divisors (see below), whose sum is σ = 13149520. Its totient is φ = 13086360.

The previous prime is 13117933. The next prime is 13117963. The reversal of 13117939 is 93971131.

13117939 is digitally balanced in base 2 and base 3, because in such bases 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 an emirpimes, since its reverse is a distinct semiprime: 93971131 = 19 ⋅4945849.

It is a cyclic number.

It is not a de Polignac number, because 13117939 - 2⁹ = 13117427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13117933) 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, 15159 + ... + 16000.

It is an arithmetic number, because the mean of its divisors is an integer number (3287380).

Almost surely, 2^13117939 is an apocalyptic number.

13117939 is a deficient number, since it is larger than the sum of its proper divisors (31581).

13117939 is an equidigital number, since it uses as much as digits as its factorization.

13117939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31580.

The product of its digits is 5103, while the sum is 34.

The square root of 13117939 is about 3621.8695448622. The cubic root of 13117939 is about 235.8423909363.

The spelling of 13117939 in words is "thirteen million, one hundred seventeen thousand, nine hundred thirty-nine".