118868909 has 2 divisors, whose sum is σ = 118868910. Its totient is φ = 118868908.

The previous prime is 118868887. The next prime is 118868917. The reversal of 118868909 is 909868811.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84235684 + 34633225 = 9178^2 + 5885^2 .

It is an emirp because it is prime and its reverse (909868811) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118868909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118868989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59434454 + 59434455.

It is an arithmetic number, because the mean of its divisors is an integer number (59434455).

Almost surely, 2^118868909 is an apocalyptic number.

It is an amenable number.

118868909 is a deficient number, since it is larger than the sum of its proper divisors (1).

118868909 is an equidigital number, since it uses as much as digits as its factorization.

118868909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 50.

The square root of 118868909 is about 10902.7019128288. The cubic root of 118868909 is about 491.6877921530.

The spelling of 118868909 in words is "one hundred eighteen million, eight hundred sixty-eight thousand, nine hundred nine".