12936494393 has 2 divisors, whose sum is σ = 12936494394. Its totient is φ = 12936494392.

The previous prime is 12936494387. The next prime is 12936494477. The reversal of 12936494393 is 39349463921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12829413289 + 107081104 = 113267^2 + 10348^2 .

It is an emirp because it is prime and its reverse (39349463921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12936494393 - 2¹⁸ = 12936232249 is a prime.

It is not a weakly prime, because it can be changed into another prime (12936494303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6468247196 + 6468247197.

It is an arithmetic number, because the mean of its divisors is an integer number (6468247197).

Almost surely, 2^12936494393 is an apocalyptic number.

It is an amenable number.

12936494393 is a deficient number, since it is larger than the sum of its proper divisors (1).

12936494393 is an equidigital number, since it uses as much as digits as its factorization.

12936494393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3779136, while the sum is 53.

The spelling of 12936494393 in words is "twelve billion, nine hundred thirty-six million, four hundred ninety-four thousand, three hundred ninety-three".