115665189 has 8 divisors (see below), whose sum is σ = 155717952. Its totient is φ = 76361280.

The previous prime is 115665113. The next prime is 115665191. The reversal of 115665189 is 981566511.

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

It is not a de Polignac number, because 115665189 - 2⁸ = 115664933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 115665189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115664189) 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, 186852 + ... + 187469.

It is an arithmetic number, because the mean of its divisors is an integer number (19464744).

Almost surely, 2^115665189 is an apocalyptic number.

It is an amenable number.

115665189 is a deficient number, since it is larger than the sum of its proper divisors (40052763).

115665189 is a wasteful number, since it uses less digits than its factorization.

115665189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374427.

The product of its digits is 64800, while the sum is 42.

The square root of 115665189 is about 10754.7751719876. The cubic root of 115665189 is about 487.2302275984.

The spelling of 115665189 in words is "one hundred fifteen million, six hundred sixty-five thousand, one hundred eighty-nine".