115965909 has 12 divisors (see below), whose sum is σ = 167605152. Its totient is φ = 77265000.

The previous prime is 115965869. The next prime is 115965919. The reversal of 115965909 is 909569511.

It is a happy number.

115965909 is a `hidden beast` number, since 1 + 1 + 59 + 6 + 590 + 9 = 666.

It is not a de Polignac number, because 115965909 - 2⁷ = 115965781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115965919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20434 + ... + 25484.

It is an arithmetic number, because the mean of its divisors is an integer number (13967096).

Almost surely, 2^115965909 is an apocalyptic number.

It is an amenable number.

115965909 is a deficient number, since it is larger than the sum of its proper divisors (51639243).

115965909 is a wasteful number, since it uses less digits than its factorization.

115965909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7608 (or 7605 counting only the distinct ones).

The product of its (nonzero) digits is 109350, while the sum is 45.

The square root of 115965909 is about 10768.7468630291. The cubic root of 115965909 is about 487.6521150551.

The spelling of 115965909 in words is "one hundred fifteen million, nine hundred sixty-five thousand, nine hundred nine".