12686697 has 6 divisors (see below), whose sum is σ = 18325242. Its totient is φ = 8457792.

The previous prime is 12686647. The next prime is 12686747. The reversal of 12686697 is 79668621.

It is an interprime number because it is at equal distance from previous prime (12686647) and next prime (12686747).

It can be written as a sum of positive squares in only one way, i.e., 6456681 + 6230016 = 2541^2 + 2496^2 .

It is not a de Polignac number, because 12686697 - 2⁸ = 12686441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12686627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 704808 + ... + 704825.

It is an arithmetic number, because the mean of its divisors is an integer number (3054207).

Almost surely, 2^12686697 is an apocalyptic number.

It is an amenable number.

12686697 is a deficient number, since it is larger than the sum of its proper divisors (5638545).

12686697 is a wasteful number, since it uses less digits than its factorization.

12686697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1409639 (or 1409636 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 12686697 is about 3561.8389913077. The cubic root of 12686697 is about 233.2291641593.

The spelling of 12686697 in words is "twelve million, six hundred eighty-six thousand, six hundred ninety-seven".