118168009 has 2 divisors, whose sum is σ = 118168010. Its totient is φ = 118168008.

The previous prime is 118168007. The next prime is 118168021. The reversal of 118168009 is 900861811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59721984 + 58446025 = 7728^2 + 7645^2 .

It is an emirp because it is prime and its reverse (900861811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 118168009 - 2¹ = 118168007 is a prime.

Together with 118168007, it forms a pair of twin primes.

It is equal to p_6743275 and since 118168009 and 6743275 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (118168007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59084004 + 59084005.

It is an arithmetic number, because the mean of its divisors is an integer number (59084005).

Almost surely, 2^118168009 is an apocalyptic number.

It is an amenable number.

118168009 is a deficient number, since it is larger than the sum of its proper divisors (1).

118168009 is an equidigital number, since it uses as much as digits as its factorization.

118168009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 34.

The square root of 118168009 is about 10870.5109815500. The cubic root of 118168009 is about 490.7194886320.

The spelling of 118168009 in words is "one hundred eighteen million, one hundred sixty-eight thousand, nine".