12138879713 has 2 divisors, whose sum is σ = 12138879714. Its totient is φ = 12138879712.

The previous prime is 12138879689. The next prime is 12138879719. The reversal of 12138879713 is 31797883121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6233418304 + 5905461409 = 78952^2 + 76847^2 .

It is a cyclic number.

It is not a de Polignac number, because 12138879713 - 2¹⁴ = 12138863329 is a prime.

It is not a weakly prime, because it can be changed into another prime (12138879719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6069439856 + 6069439857.

It is an arithmetic number, because the mean of its divisors is an integer number (6069439857).

Almost surely, 2^12138879713 is an apocalyptic number.

It is an amenable number.

12138879713 is a deficient number, since it is larger than the sum of its proper divisors (1).

12138879713 is an equidigital number, since it uses as much as digits as its factorization.

12138879713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 50.

The spelling of 12138879713 in words is "twelve billion, one hundred thirty-eight million, eight hundred seventy-nine thousand, seven hundred thirteen".