115660613 has 4 divisors (see below), whose sum is σ = 119648940. Its totient is φ = 111672288.

The previous prime is 115660609. The next prime is 115660621. The reversal of 115660613 is 316066511.

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 46471489 + 69189124 = 6817^2 + 8318^2 .

It is a cyclic number.

It is not a de Polignac number, because 115660613 - 2² = 115660609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 3988297 = 115660613 / (1 + 1 + 5 + 6 + 6 + 0 + 6 + 1 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115660513) 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, 1994120 + ... + 1994177.

It is an arithmetic number, because the mean of its divisors is an integer number (29912235).

Almost surely, 2^115660613 is an apocalyptic number.

It is an amenable number.

115660613 is a deficient number, since it is larger than the sum of its proper divisors (3988327).

115660613 is an equidigital number, since it uses as much as digits as its factorization.

115660613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3988326.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 115660613 is about 10754.5624271748. The cubic root of 115660613 is about 487.2238021707.

The spelling of 115660613 in words is "one hundred fifteen million, six hundred sixty thousand, six hundred thirteen".