118942909 has 2 divisors, whose sum is σ = 118942910. Its totient is φ = 118942908.

The previous prime is 118942903. The next prime is 118942921. The reversal of 118942909 is 909249811.

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., 118483225 + 459684 = 10885^2 + 678^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118942909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118942903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59471454 + 59471455.

It is an arithmetic number, because the mean of its divisors is an integer number (59471455).

Almost surely, 2^118942909 is an apocalyptic number.

It is an amenable number.

118942909 is a deficient number, since it is larger than the sum of its proper divisors (1).

118942909 is an equidigital number, since it uses as much as digits as its factorization.

118942909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 118942909 is about 10906.0950390137. The cubic root of 118942909 is about 491.7898018634.

The spelling of 118942909 in words is "one hundred eighteen million, nine hundred forty-two thousand, nine hundred nine".