13683665 has 4 divisors (see below), whose sum is σ = 16420404. Its totient is φ = 10946928.

The previous prime is 13683613. The next prime is 13683727. The reversal of 13683665 is 56638631.

13683665 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.

It can be written as a sum of positive squares in 2 ways, for example, as 6677056 + 7006609 = 2584^2 + 2647^2 .

It is a cyclic number.

It is not a de Polignac number, because 13683665 - 2⁸ = 13683409 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1368362 + ... + 1368371.

It is an arithmetic number, because the mean of its divisors is an integer number (4105101).

Almost surely, 2^13683665 is an apocalyptic number.

It is an amenable number.

13683665 is a deficient number, since it is larger than the sum of its proper divisors (2736739).

13683665 is an equidigital number, since it uses as much as digits as its factorization.

13683665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2736738.

The product of its digits is 77760, while the sum is 38.

The square root of 13683665 is about 3699.1438198589. The cubic root of 13683665 is about 239.1851124484.

The spelling of 13683665 in words is "thirteen million, six hundred eighty-three thousand, six hundred sixty-five".