12513889 has 2 divisors, whose sum is σ = 12513890. Its totient is φ = 12513888.

The previous prime is 12513869. The next prime is 12513901. The reversal of 12513889 is 98831521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7246864 + 5267025 = 2692^2 + 2295^2 .

It is a cyclic number.

It is not a de Polignac number, because 12513889 - 2⁵ = 12513857 is a prime.

It is not a weakly prime, because it can be changed into another prime (12513859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6256944 + 6256945.

It is an arithmetic number, because the mean of its divisors is an integer number (6256945).

Almost surely, 2^12513889 is an apocalyptic number.

It is an amenable number.

12513889 is a deficient number, since it is larger than the sum of its proper divisors (1).

12513889 is an equidigital number, since it uses as much as digits as its factorization.

12513889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 37.

The square root of 12513889 is about 3537.4975618366. The cubic root of 12513889 is about 232.1653659009.

The spelling of 12513889 in words is "twelve million, five hundred thirteen thousand, eight hundred eighty-nine".