13915939 has 2 divisors, whose sum is σ = 13915940. Its totient is φ = 13915938.

The previous prime is 13915927. The next prime is 13915981. The reversal of 13915939 is 93951931.

13915939 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 is an emirp because it is prime and its reverse (93951931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13915939 - 2⁵ = 13915907 is a prime.

It is not a weakly prime, because it can be changed into another prime (13915919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6957969 + 6957970.

It is an arithmetic number, because the mean of its divisors is an integer number (6957970).

Almost surely, 2^13915939 is an apocalyptic number.

13915939 is a deficient number, since it is larger than the sum of its proper divisors (1).

13915939 is an equidigital number, since it uses as much as digits as its factorization.

13915939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32805, while the sum is 40.

The square root of 13915939 is about 3730.4073504109. The cubic root of 13915939 is about 240.5308792291.

The spelling of 13915939 in words is "thirteen million, nine hundred fifteen thousand, nine hundred thirty-nine".