13686863 has 4 divisors (see below), whose sum is σ = 14281968. Its totient is φ = 13091760.

The previous prime is 13686851. The next prime is 13686889. The reversal of 13686863 is 36868631.

13686863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36868631 = 17 ⋅2168743.

It is a cyclic number.

It is not a de Polignac number, because 13686863 - 2²² = 9492559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13686863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13686833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297518 + ... + 297563.

It is an arithmetic number, because the mean of its divisors is an integer number (3570492).

Almost surely, 2^13686863 is an apocalyptic number.

13686863 is a deficient number, since it is larger than the sum of its proper divisors (595105).

13686863 is an equidigital number, since it uses as much as digits as its factorization.

13686863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595104.

The product of its digits is 124416, while the sum is 41.

The square root of 13686863 is about 3699.5760567935. The cubic root of 13686863 is about 239.2037442601.

The spelling of 13686863 in words is "thirteen million, six hundred eighty-six thousand, eight hundred sixty-three".