115660091 has 8 divisors (see below), whose sum is σ = 122195520. Its totient is φ = 109294528.

The previous prime is 115660081. The next prime is 115660099. The reversal of 115660091 is 190066511.

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 115660091 - 2²⁶ = 48551227 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115660099) 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, 41066 + ... + 43791.

It is an arithmetic number, because the mean of its divisors is an integer number (15274440).

Almost surely, 2^115660091 is an apocalyptic number.

115660091 is a deficient number, since it is larger than the sum of its proper divisors (6535429).

115660091 is an equidigital number, since it uses as much as digits as its factorization.

115660091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84933.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 115660091 is about 10754.5381583776. The cubic root of 115660091 is about 487.2230691894.

The spelling of 115660091 in words is "one hundred fifteen million, six hundred sixty thousand, ninety-one".