13856911 has 2 divisors, whose sum is σ = 13856912. Its totient is φ = 13856910.

The previous prime is 13856891. The next prime is 13856923. The reversal of 13856911 is 11965831.

It is a strong prime.

It is an emirp because it is prime and its reverse (11965831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13856911 - 2¹³ = 13848719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13850911) 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, 6928455 + 6928456.

It is an arithmetic number, because the mean of its divisors is an integer number (6928456).

Almost surely, 2^13856911 is an apocalyptic number.

13856911 is a deficient number, since it is larger than the sum of its proper divisors (1).

13856911 is an equidigital number, since it uses as much as digits as its factorization.

13856911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 34.

The square root of 13856911 is about 3722.4872061567. The cubic root of 13856911 is about 240.1903062341.

The spelling of 13856911 in words is "thirteen million, eight hundred fifty-six thousand, nine hundred eleven".