13213686 has 16 divisors (see below), whose sum is σ = 26474544. Its totient is φ = 4396704.

The previous prime is 13213679. The next prime is 13213691. The reversal of 13213686 is 68631231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2436 + ... + 5688.

It is an arithmetic number, because the mean of its divisors is an integer number (1654659).

Almost surely, 2^13213686 is an apocalyptic number.

13213686 is an abundant number, since it is smaller than the sum of its proper divisors (13260858).

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

13213686 is a wasteful number, since it uses less digits than its factorization.

13213686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3935.

The product of its digits is 5184, while the sum is 30.

The square root of 13213686 is about 3635.0634107261. The cubic root of 13213686 is about 236.4148000503.

The spelling of 13213686 in words is "thirteen million, two hundred thirteen thousand, six hundred eighty-six".