13918919 has 16 divisors (see below), whose sum is σ = 16623936. Its totient is φ = 11404800.

The previous prime is 13918901. The next prime is 13918921. The reversal of 13918919 is 91981931.

It is a happy number.

13918919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13918919 is a prime.

It is a super-2 number, since 2×13918919² = 387472612257122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13918939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15359 + ... + 16239.

It is an arithmetic number, because the mean of its divisors is an integer number (1038996).

Almost surely, 2^13918919 is an apocalyptic number.

13918919 is a deficient number, since it is larger than the sum of its proper divisors (2705017).

13918919 is an equidigital number, since it uses as much as digits as its factorization.

13918919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986.

The product of its digits is 17496, while the sum is 41.

The square root of 13918919 is about 3730.8067492166. The cubic root of 13918919 is about 240.5480473331.

The spelling of 13918919 in words is "thirteen million, nine hundred eighteen thousand, nine hundred nineteen".