12686647 has 2 divisors, whose sum is σ = 12686648. Its totient is φ = 12686646.

The previous prime is 12686629. The next prime is 12686747. The reversal of 12686647 is 74668621.

12686647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (74668621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12686647 - 2²³ = 4298039 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12686627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6343323 + 6343324.

It is an arithmetic number, because the mean of its divisors is an integer number (6343324).

Almost surely, 2^12686647 is an apocalyptic number.

12686647 is a deficient number, since it is larger than the sum of its proper divisors (1).

12686647 is an equidigital number, since it uses as much as digits as its factorization.

12686647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 40.

The square root of 12686647 is about 3561.8319724546. The cubic root of 12686647 is about 233.2288577629.

The spelling of 12686647 in words is "twelve million, six hundred eighty-six thousand, six hundred forty-seven".