115639613 has 4 divisors (see below), whose sum is σ = 116245248. Its totient is φ = 115033980.

The previous prime is 115639609. The next prime is 115639619. The reversal of 115639613 is 316936511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 115639613 - 2² = 115639609 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115639619) 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, 302531 + ... + 302912.

It is an arithmetic number, because the mean of its divisors is an integer number (29061312).

Almost surely, 2^115639613 is an apocalyptic number.

It is an amenable number.

115639613 is a deficient number, since it is larger than the sum of its proper divisors (605635).

115639613 is an equidigital number, since it uses as much as digits as its factorization.

115639613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605634.

The product of its digits is 14580, while the sum is 35.

The square root of 115639613 is about 10753.5860530337. The cubic root of 115639613 is about 487.1943126759.

The spelling of 115639613 in words is "one hundred fifteen million, six hundred thirty-nine thousand, six hundred thirteen".