12879013117 has 4 divisors (see below), whose sum is σ = 12879246240. Its totient is φ = 12878779996.

The previous prime is 12879013073. The next prime is 12879013151. The reversal of 12879013117 is 71131097821.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12879013117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12879013117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12879013177) 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, 18384 + ... + 161542.

It is an arithmetic number, because the mean of its divisors is an integer number (3219811560).

Almost surely, 2^12879013117 is an apocalyptic number.

It is an amenable number.

12879013117 is a deficient number, since it is larger than the sum of its proper divisors (233123).

12879013117 is an equidigital number, since it uses as much as digits as its factorization.

12879013117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233122.

The product of its (nonzero) digits is 21168, while the sum is 40.

The spelling of 12879013117 in words is "twelve billion, eight hundred seventy-nine million, thirteen thousand, one hundred seventeen".