12686189 has 2 divisors, whose sum is σ = 12686190. Its totient is φ = 12686188.

The previous prime is 12686173. The next prime is 12686197. The reversal of 12686189 is 98168621.

12686189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10510564 + 2175625 = 3242^2 + 1475^2 .

It is a cyclic number.

It is not a de Polignac number, because 12686189 - 2⁴ = 12686173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12686119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6343094 + 6343095.

It is an arithmetic number, because the mean of its divisors is an integer number (6343095).

Almost surely, 2^12686189 is an apocalyptic number.

It is an amenable number.

12686189 is a deficient number, since it is larger than the sum of its proper divisors (1).

12686189 is an equidigital number, since it uses as much as digits as its factorization.

12686189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 41.

The square root of 12686189 is about 3561.7676791166. The cubic root of 12686189 is about 233.2260511348.

The spelling of 12686189 in words is "twelve million, six hundred eighty-six thousand, one hundred eighty-nine".