13989379 has 2 divisors, whose sum is σ = 13989380. Its totient is φ = 13989378.

The previous prime is 13989361. The next prime is 13989383. The reversal of 13989379 is 97398931.

13989379 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13989379 - 2¹⁵ = 13956611 is a prime.

It is not a weakly prime, because it can be changed into another prime (13989389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6994689 + 6994690.

It is an arithmetic number, because the mean of its divisors is an integer number (6994690).

Almost surely, 2^13989379 is an apocalyptic number.

13989379 is a deficient number, since it is larger than the sum of its proper divisors (1).

13989379 is an equidigital number, since it uses as much as digits as its factorization.

13989379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 49.

The square root of 13989379 is about 3740.2378266629. The cubic root of 13989379 is about 240.9532630913.

The spelling of 13989379 in words is "thirteen million, nine hundred eighty-nine thousand, three hundred seventy-nine".