12513889937 has 2 divisors, whose sum is σ = 12513889938. Its totient is φ = 12513889936.

The previous prime is 12513889909. The next prime is 12513890033. The reversal of 12513889937 is 73998831521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8596256656 + 3917633281 = 92716^2 + 62591^2 .

It is a cyclic number.

It is not a de Polignac number, because 12513889937 - 2⁸ = 12513889681 is a prime.

It is not a weakly prime, because it can be changed into another prime (12513889237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6256944968 + 6256944969.

It is an arithmetic number, because the mean of its divisors is an integer number (6256944969).

Almost surely, 2^12513889937 is an apocalyptic number.

It is an amenable number.

12513889937 is a deficient number, since it is larger than the sum of its proper divisors (1).

12513889937 is an equidigital number, since it uses as much as digits as its factorization.

12513889937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 56.

The spelling of 12513889937 in words is "twelve billion, five hundred thirteen million, eight hundred eighty-nine thousand, nine hundred thirty-seven".