13031099979 has 4 divisors (see below), whose sum is σ = 17374799976. Its totient is φ = 8687399984.

The previous prime is 13031099971. The next prime is 13031099999. The reversal of 13031099979 is 97999013031.

13031099979 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 13031099979 - 2³ = 13031099971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13031099971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2171849994 + ... + 2171849999.

It is an arithmetic number, because the mean of its divisors is an integer number (4343699994).

Almost surely, 2^13031099979 is an apocalyptic number.

13031099979 is a deficient number, since it is larger than the sum of its proper divisors (4343699997).

13031099979 is an equidigital number, since it uses as much as digits as its factorization.

13031099979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4343699996.

The product of its (nonzero) digits is 413343, while the sum is 51.

The spelling of 13031099979 in words is "thirteen billion, thirty-one million, ninety-nine thousand, nine hundred seventy-nine".