13904939 has 2 divisors, whose sum is σ = 13904940. Its totient is φ = 13904938.

The previous prime is 13904927. The next prime is 13904959. The reversal of 13904939 is 93940931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13904939 - 2⁴ = 13904923 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13904909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6952469 + 6952470.

It is an arithmetic number, because the mean of its divisors is an integer number (6952470).

Almost surely, 2^13904939 is an apocalyptic number.

13904939 is a deficient number, since it is larger than the sum of its proper divisors (1).

13904939 is an equidigital number, since it uses as much as digits as its factorization.

13904939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 13904939 is about 3728.9326891216. The cubic root of 13904939 is about 240.4674858038.

Subtracting from 13904939 its sum of digits (38), we obtain a triangular number (13904901 = T₅₂₇₃).

The spelling of 13904939 in words is "thirteen million, nine hundred four thousand, nine hundred thirty-nine".