118432009 has 2 divisors, whose sum is σ = 118432010. Its totient is φ = 118432008.

The previous prime is 118431983. The next prime is 118432087. The reversal of 118432009 is 900234811.

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., 92217609 + 26214400 = 9603^2 + 5120^2 .

It is a cyclic number.

It is not a de Polignac number, because 118432009 - 2¹⁹ = 117907721 is a prime.

It is a super-2 number, since 2×118432009² = 28052281511552162, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (118432099) 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, 59216004 + 59216005.

It is an arithmetic number, because the mean of its divisors is an integer number (59216005).

Almost surely, 2^118432009 is an apocalyptic number.

It is an amenable number.

118432009 is a deficient number, since it is larger than the sum of its proper divisors (1).

118432009 is an equidigital number, since it uses as much as digits as its factorization.

118432009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 118432009 is about 10882.6471503950. The cubic root of 118432009 is about 491.0846568065.

The spelling of 118432009 in words is "one hundred eighteen million, four hundred thirty-two thousand, nine".