118959809 has 2 divisors, whose sum is σ = 118959810. Its totient is φ = 118959808.

The previous prime is 118959751. The next prime is 118959811. The reversal of 118959809 is 908959811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103530625 + 15429184 = 10175^2 + 3928^2 .

It is a cyclic number.

It is not a de Polignac number, because 118959809 - 2⁸ = 118959553 is a prime.

Together with 118959811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (118959889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59479904 + 59479905.

It is an arithmetic number, because the mean of its divisors is an integer number (59479905).

Almost surely, 2^118959809 is an apocalyptic number.

It is an amenable number.

118959809 is a deficient number, since it is larger than the sum of its proper divisors (1).

118959809 is an equidigital number, since it uses as much as digits as its factorization.

118959809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 50.

The square root of 118959809 is about 10906.8698076029. The cubic root of 118959809 is about 491.8130927406.

The spelling of 118959809 in words is "one hundred eighteen million, nine hundred fifty-nine thousand, eight hundred nine".