115566617 has 4 divisors (see below), whose sum is σ = 115819956. Its totient is φ = 115313280.

The previous prime is 115566613. The next prime is 115566623. The reversal of 115566617 is 716665511.

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

It can be written as a sum of positive squares in 2 ways, for example, as 57441241 + 58125376 = 7579^2 + 7624^2 .

It is a cyclic number.

It is not a de Polignac number, because 115566617 - 2² = 115566613 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115566613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125984 + ... + 126897.

It is an arithmetic number, because the mean of its divisors is an integer number (28954989).

Almost surely, 2^115566617 is an apocalyptic number.

It is an amenable number.

115566617 is a deficient number, since it is larger than the sum of its proper divisors (253339).

115566617 is an equidigital number, since it uses as much as digits as its factorization.

115566617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253338.

The product of its digits is 37800, while the sum is 38.

The square root of 115566617 is about 10750.1914866666. The cubic root of 115566617 is about 487.0917794098.

The spelling of 115566617 in words is "one hundred fifteen million, five hundred sixty-six thousand, six hundred seventeen".