13907621 has 16 divisors (see below), whose sum is σ = 17472000. Its totient is φ = 11000304.

The previous prime is 13907603. The next prime is 13907681. The reversal of 13907621 is 12670931.

13907621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13907621 - 2⁶ = 13907557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13907681) 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, 2900 + ... + 6018.

It is an arithmetic number, because the mean of its divisors is an integer number (1092000).

Almost surely, 2^13907621 is an apocalyptic number.

It is an amenable number.

13907621 is a deficient number, since it is larger than the sum of its proper divisors (3564379).

13907621 is an equidigital number, since it uses as much as digits as its factorization.

13907621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3153 (or 3139 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 13907621 is about 3729.2922921112. The cubic root of 13907621 is about 240.4829453547.

The spelling of 13907621 in words is "thirteen million, nine hundred seven thousand, six hundred twenty-one".