13918109 has 2 divisors, whose sum is σ = 13918110. Its totient is φ = 13918108.

The previous prime is 13918067. The next prime is 13918117. The reversal of 13918109 is 90181931.

13918109 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12602500 + 1315609 = 3550^2 + 1147^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13918109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13918129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6959054 + 6959055.

It is an arithmetic number, because the mean of its divisors is an integer number (6959055).

Almost surely, 2^13918109 is an apocalyptic number.

It is an amenable number.

13918109 is a deficient number, since it is larger than the sum of its proper divisors (1).

13918109 is an equidigital number, since it uses as much as digits as its factorization.

13918109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 13918109 is about 3730.6981920279. The cubic root of 13918109 is about 240.5433810776.

The spelling of 13918109 in words is "thirteen million, nine hundred eighteen thousand, one hundred nine".