13140979 has 4 divisors (see below), whose sum is σ = 13388976. Its totient is φ = 12892984.

The previous prime is 13140977. The next prime is 13140997. The reversal of 13140979 is 97904131.

13140979 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.

It is a cyclic number.

It is not a de Polignac number, because 13140979 - 2¹ = 13140977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13140977) 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, 123919 + ... + 124024.

It is an arithmetic number, because the mean of its divisors is an integer number (3347244).

Almost surely, 2^13140979 is an apocalyptic number.

13140979 is a deficient number, since it is larger than the sum of its proper divisors (247997).

13140979 is an equidigital number, since it uses as much as digits as its factorization.

13140979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247996.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 13140979 is about 3625.0488272574. The cubic root of 13140979 is about 235.9803859501.

The spelling of 13140979 in words is "thirteen million, one hundred forty thousand, nine hundred seventy-nine".