13683621 has 16 divisors (see below), whose sum is σ = 21571200. Its totient is φ = 7549248.

The previous prime is 13683613. The next prime is 13683727. The reversal of 13683621 is 12638631.

13683621 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13683621 - 2³ = 13683613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13681621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10626 + ... + 11843.

It is an arithmetic number, because the mean of its divisors is an integer number (1348200).

Almost surely, 2^13683621 is an apocalyptic number.

It is an amenable number.

13683621 is a deficient number, since it is larger than the sum of its proper divisors (7887579).

13683621 is a wasteful number, since it uses less digits than its factorization.

13683621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22508.

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

The square root of 13683621 is about 3699.1378725319. The cubic root of 13683621 is about 239.1848560805.

The spelling of 13683621 in words is "thirteen million, six hundred eighty-three thousand, six hundred twenty-one".