118720009 has 2 divisors, whose sum is σ = 118720010. Its totient is φ = 118720008.

The previous prime is 118720001. The next prime is 118720079. The reversal of 118720009 is 900027811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108222409 + 10497600 = 10403^2 + 3240^2 .

It is a cyclic number.

It is not a de Polignac number, because 118720009 - 2³ = 118720001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (118720001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59360004 + 59360005.

It is an arithmetic number, because the mean of its divisors is an integer number (59360005).

Almost surely, 2^118720009 is an apocalyptic number.

It is an amenable number.

118720009 is a deficient number, since it is larger than the sum of its proper divisors (1).

118720009 is an equidigital number, since it uses as much as digits as its factorization.

118720009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 118720009 is about 10895.8711905015. The cubic root of 118720009 is about 491.4824037025.

The spelling of 118720009 in words is "one hundred eighteen million, seven hundred twenty thousand, nine".