118214909 has 2 divisors, whose sum is σ = 118214910. Its totient is φ = 118214908.

The previous prime is 118214893. The next prime is 118214911. The reversal of 118214909 is 909412811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98942809 + 19272100 = 9947^2 + 4390^2 .

It is an emirp because it is prime and its reverse (909412811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 118214909 - 2⁴ = 118214893 is a prime.

Together with 118214911, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_6745814 and since 118214909 and 6745814 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118214989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59107454 + 59107455.

It is an arithmetic number, because the mean of its divisors is an integer number (59107455).

Almost surely, 2^118214909 is an apocalyptic number.

It is an amenable number.

118214909 is a deficient number, since it is larger than the sum of its proper divisors (1).

118214909 is an equidigital number, since it uses as much as digits as its factorization.

118214909 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 35.

The square root of 118214909 is about 10872.6679798474. The cubic root of 118214909 is about 490.7844010114.

The spelling of 118214909 in words is "one hundred eighteen million, two hundred fourteen thousand, nine hundred nine".