13137979 has 4 divisors (see below), whose sum is σ = 13268160. Its totient is φ = 13007800.

The previous prime is 13137973. The next prime is 13137989. The reversal of 13137979 is 97973131.

It is a happy number.

13137979 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 an emirpimes, since its reverse is a distinct semiprime: 97973131 = 101 ⋅970031.

It is a cyclic number.

It is not a de Polignac number, because 13137979 - 2⁵ = 13137947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13137973) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64939 + ... + 65140.

It is an arithmetic number, because the mean of its divisors is an integer number (3317040).

Almost surely, 2^13137979 is an apocalyptic number.

13137979 is a deficient number, since it is larger than the sum of its proper divisors (130181).

13137979 is a wasteful number, since it uses less digits than its factorization.

13137979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130180.

The product of its digits is 35721, while the sum is 40.

The square root of 13137979 is about 3624.6350161085. The cubic root of 13137979 is about 235.9624269879.

The spelling of 13137979 in words is "thirteen million, one hundred thirty-seven thousand, nine hundred seventy-nine".