115406999 has 4 divisors (see below), whose sum is σ = 122195664. Its totient is φ = 108618336.

The previous prime is 115406987. The next prime is 115407001. The reversal of 115406999 is 999604511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 115406999 - 2²⁰ = 114358423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115406909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3394307 + ... + 3394340.

It is an arithmetic number, because the mean of its divisors is an integer number (30548916).

Almost surely, 2^115406999 is an apocalyptic number.

115406999 is a deficient number, since it is larger than the sum of its proper divisors (6788665).

115406999 is an equidigital number, since it uses as much as digits as its factorization.

115406999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6788664.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 115406999 is about 10742.7649606607. The cubic root of 115406999 is about 486.8674226996.

The spelling of 115406999 in words is "one hundred fifteen million, four hundred six thousand, nine hundred ninety-nine".