118230509 has 2 divisors, whose sum is σ = 118230510. Its totient is φ = 118230508.

The previous prime is 118230479. The next prime is 118230517. The reversal of 118230509 is 905032811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109098025 + 9132484 = 10445^2 + 3022^2 .

It is a cyclic number.

It is not a de Polignac number, because 118230509 - 2⁸ = 118230253 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118230569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59115254 + 59115255.

It is an arithmetic number, because the mean of its divisors is an integer number (59115255).

Almost surely, 2^118230509 is an apocalyptic number.

It is an amenable number.

118230509 is a deficient number, since it is larger than the sum of its proper divisors (1).

118230509 is an equidigital number, since it uses as much as digits as its factorization.

118230509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 118230509 is about 10873.3853513982. The cubic root of 118230509 is about 490.8059885307.

The spelling of 118230509 in words is "one hundred eighteen million, two hundred thirty thousand, five hundred nine".