115455989 has 32 divisors (see below), whose sum is σ = 140659200. Its totient is φ = 93562560.

The previous prime is 115455983. The next prime is 115456007. The reversal of 115455989 is 989554511.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 115455989 - 2²⁰ = 114407413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115455983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 260402 + ... + 260844.

It is an arithmetic number, because the mean of its divisors is an integer number (4395600).

Almost surely, 2^115455989 is an apocalyptic number.

115455989 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

115455989 is a deficient number, since it is larger than the sum of its proper divisors (25203211).

115455989 is a wasteful number, since it uses less digits than its factorization.

115455989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545.

The product of its digits is 324000, while the sum is 47.

The square root of 115455989 is about 10745.0448579799. The cubic root of 115455989 is about 486.9363043129.

The spelling of 115455989 in words is "one hundred fifteen million, four hundred fifty-five thousand, nine hundred eighty-nine".