12872612117 has 2 divisors, whose sum is σ = 12872612118. Its totient is φ = 12872612116.

The previous prime is 12872612063. The next prime is 12872612183. The reversal of 12872612117 is 71121627821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12420879601 + 451732516 = 111449^2 + 21254^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12872612117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12872612197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6436306058 + 6436306059.

It is an arithmetic number, because the mean of its divisors is an integer number (6436306059).

Almost surely, 2^12872612117 is an apocalyptic number.

It is an amenable number.

12872612117 is a deficient number, since it is larger than the sum of its proper divisors (1).

12872612117 is an equidigital number, since it uses as much as digits as its factorization.

12872612117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 38.

The spelling of 12872612117 in words is "twelve billion, eight hundred seventy-two million, six hundred twelve thousand, one hundred seventeen".