108118909 has 2 divisors, whose sum is σ = 108118910. Its totient is φ = 108118908.

The previous prime is 108118903. The next prime is 108118951. The reversal of 108118909 is 909811801.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107702884 + 416025 = 10378^2 + 645^2 .

It is a cyclic number.

It is not a de Polignac number, because 108118909 - 2⁵ = 108118877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108118903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54059454 + 54059455.

It is an arithmetic number, because the mean of its divisors is an integer number (54059455).

Almost surely, 2^108118909 is an apocalyptic number.

It is an amenable number.

108118909 is a deficient number, since it is larger than the sum of its proper divisors (1).

108118909 is an equidigital number, since it uses as much as digits as its factorization.

108118909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 37.

The square root of 108118909 is about 10398.0242834877. The cubic root of 108118909 is about 476.3950258126.

The spelling of 108118909 in words is "one hundred eight million, one hundred eighteen thousand, nine hundred nine".