13890379 has 2 divisors, whose sum is σ = 13890380. Its totient is φ = 13890378.

The previous prime is 13890347. The next prime is 13890407. The reversal of 13890379 is 97309831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13890379 - 2⁵ = 13890347 is a prime.

It is not a weakly prime, because it can be changed into another prime (13890329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6945189 + 6945190.

It is an arithmetic number, because the mean of its divisors is an integer number (6945190).

Almost surely, 2^13890379 is an apocalyptic number.

13890379 is a deficient number, since it is larger than the sum of its proper divisors (1).

13890379 is an equidigital number, since it uses as much as digits as its factorization.

13890379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 13890379 is about 3726.9798765220. The cubic root of 13890379 is about 240.3835245256.

The spelling of 13890379 in words is "thirteen million, eight hundred ninety thousand, three hundred seventy-nine".