115965009 has 6 divisors (see below), whose sum is σ = 167505026. Its totient is φ = 77310000.

The previous prime is 115965001. The next prime is 115965013. The reversal of 115965009 is 900569511.

115965009 is a `hidden beast` number, since 11 + 596 + 50 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 99440784 + 16524225 = 9972^2 + 4065^2 .

It is not a de Polignac number, because 115965009 - 2³ = 115965001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (115965001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6442492 + ... + 6442509.

Almost surely, 2^115965009 is an apocalyptic number.

It is an amenable number.

115965009 is a deficient number, since it is larger than the sum of its proper divisors (51540017).

115965009 is a wasteful number, since it uses less digits than its factorization.

115965009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12885007 (or 12885004 counting only the distinct ones).

The product of its (nonzero) digits is 12150, while the sum is 36.

The square root of 115965009 is about 10768.7050753561. The cubic root of 115965009 is about 487.6508535118.

The spelling of 115965009 in words is "one hundred fifteen million, nine hundred sixty-five thousand, nine".