115900009 has 8 divisors (see below), whose sum is σ = 116958240. Its totient is φ = 114846336.

The previous prime is 115899997. The next prime is 115900039. The reversal of 115900009 is 900009511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 115900009 - 2⁵ = 115899977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115900039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67449 + ... + 69145.

It is an arithmetic number, because the mean of its divisors is an integer number (14619780).

Almost surely, 2^115900009 is an apocalyptic number.

It is an amenable number.

115900009 is a deficient number, since it is larger than the sum of its proper divisors (1058231).

115900009 is a wasteful number, since it uses less digits than its factorization.

115900009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2279.

The product of its (nonzero) digits is 405, while the sum is 25.

The square root of 115900009 is about 10765.6866478641. The cubic root of 115900009 is about 487.5597247887.

The spelling of 115900009 in words is "one hundred fifteen million, nine hundred thousand, nine".