13930621 has 2 divisors, whose sum is σ = 13930622. Its totient is φ = 13930620.

The previous prime is 13930603. The next prime is 13930649. The reversal of 13930621 is 12603931.

13930621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12859396 + 1071225 = 3586^2 + 1035^2 .

It is a cyclic number.

It is not a de Polignac number, because 13930621 - 2⁵ = 13930589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13930681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6965310 + 6965311.

It is an arithmetic number, because the mean of its divisors is an integer number (6965311).

Almost surely, 2^13930621 is an apocalyptic number.

It is an amenable number.

13930621 is a deficient number, since it is larger than the sum of its proper divisors (1).

13930621 is an equidigital number, since it uses as much as digits as its factorization.

13930621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 13930621 is about 3732.3747132355. The cubic root of 13930621 is about 240.6154401329.

The spelling of 13930621 in words is "thirteen million, nine hundred thirty thousand, six hundred twenty-one".