13686331 has 8 divisors (see below), whose sum is σ = 13983840. Its totient is φ = 13392192.

The previous prime is 13686319. The next prime is 13686359. The reversal of 13686331 is 13368631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13686331 - 2¹⁷ = 13555259 is a prime.

It is a super-2 number, since 2×13686331² = 374631312483122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13686293 and 13686302.

It is not an unprimeable number, because it can be changed into a prime (13686371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8421 + ... + 9913.

It is an arithmetic number, because the mean of its divisors is an integer number (1747980).

Almost surely, 2^13686331 is an apocalyptic number.

13686331 is a deficient number, since it is larger than the sum of its proper divisors (297509).

13686331 is a wasteful number, since it uses less digits than its factorization.

13686331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685.

The product of its digits is 7776, while the sum is 31.

The square root of 13686331 is about 3699.5041559647. The cubic root of 13686331 is about 239.2006449855.

The spelling of 13686331 in words is "thirteen million, six hundred eighty-six thousand, three hundred thirty-one".