13856939 has 2 divisors, whose sum is σ = 13856940. Its totient is φ = 13856938.

The previous prime is 13856929. The next prime is 13856959. The reversal of 13856939 is 93965831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13856939 - 2⁴ = 13856923 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13856939.

It is not a weakly prime, because it can be changed into another prime (13856929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6928469 + 6928470.

It is an arithmetic number, because the mean of its divisors is an integer number (6928470).

Almost surely, 2^13856939 is an apocalyptic number.

13856939 is a deficient number, since it is larger than the sum of its proper divisors (1).

13856939 is an equidigital number, since it uses as much as digits as its factorization.

13856939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 44.

The square root of 13856939 is about 3722.4909670810. The cubic root of 13856939 is about 240.1904680144.

The spelling of 13856939 in words is "thirteen million, eight hundred fifty-six thousand, nine hundred thirty-nine".