12919987313 has 2 divisors, whose sum is σ = 12919987314. Its totient is φ = 12919987312.

The previous prime is 12919987261. The next prime is 12919987319. The reversal of 12919987313 is 31378991921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7656775009 + 5263212304 = 87503^2 + 72548^2 .

It is a cyclic number.

It is not a de Polignac number, because 12919987313 - 2⁸ = 12919987057 is a prime.

It is not a weakly prime, because it can be changed into another prime (12919987319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6459993656 + 6459993657.

It is an arithmetic number, because the mean of its divisors is an integer number (6459993657).

Almost surely, 2^12919987313 is an apocalyptic number.

It is an amenable number.

12919987313 is a deficient number, since it is larger than the sum of its proper divisors (1).

12919987313 is an equidigital number, since it uses as much as digits as its factorization.

12919987313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 53.

The spelling of 12919987313 in words is "twelve billion, nine hundred nineteen million, nine hundred eighty-seven thousand, three hundred thirteen".