12913686 has 12 divisors (see below), whose sum is σ = 27979692. Its totient is φ = 4304556.

The previous prime is 12913679. The next prime is 12913697. The reversal of 12913686 is 68631921.

12913686 is a `hidden beast` number, since 1 + 291 + 368 + 6 = 666.

It is a super-2 number, since 2×12913686² = 333526572213192, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 12913686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 358696 + ... + 358731.

It is an arithmetic number, because the mean of its divisors is an integer number (2331641).

Almost surely, 2^12913686 is an apocalyptic number.

12913686 is an abundant number, since it is smaller than the sum of its proper divisors (15066006).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12913686 is a wasteful number, since it uses less digits than its factorization.

12913686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717435 (or 717432 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 12913686 is about 3593.5617428952. The cubic root of 12913686 is about 234.6119202129.

The spelling of 12913686 in words is "twelve million, nine hundred thirteen thousand, six hundred eighty-six".