13911109 has 2 divisors, whose sum is σ = 13911110. Its totient is φ = 13911108.

The previous prime is 13911071. The next prime is 13911119. The reversal of 13911109 is 90111931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7306209 + 6604900 = 2703^2 + 2570^2 .

It is a cyclic number.

It is not a de Polignac number, because 13911109 - 2¹¹ = 13909061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13911119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6955554 + 6955555.

It is an arithmetic number, because the mean of its divisors is an integer number (6955555).

Almost surely, 2^13911109 is an apocalyptic number.

It is an amenable number.

13911109 is a deficient number, since it is larger than the sum of its proper divisors (1).

13911109 is an equidigital number, since it uses as much as digits as its factorization.

13911109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243, while the sum is 25.

The square root of 13911109 is about 3729.7599118442. The cubic root of 13911109 is about 240.5030478677.

It can be divided in two parts, 1391 and 1109, that added together give a square (2500 = 50²).

The spelling of 13911109 in words is "thirteen million, nine hundred eleven thousand, one hundred nine".