113115989 has 4 divisors (see below), whose sum is σ = 129275424. Its totient is φ = 96956556.

The previous prime is 113115973. The next prime is 113115991. The reversal of 113115989 is 989511311.

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, and also an emirpimes, since its reverse is a distinct semiprime: 989511311 = 277 ⋅3572243.

It is a cyclic number.

It is not a de Polignac number, because 113115989 - 2⁴ = 113115973 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 (113115389) 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, 8079707 + ... + 8079720.

It is an arithmetic number, because the mean of its divisors is an integer number (32318856).

Almost surely, 2^113115989 is an apocalyptic number.

It is an amenable number.

113115989 is a deficient number, since it is larger than the sum of its proper divisors (16159435).

113115989 is an equidigital number, since it uses as much as digits as its factorization.

113115989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16159434.

The product of its digits is 9720, while the sum is 38.

The square root of 113115989 is about 10635.6000770996. The cubic root of 113115989 is about 483.6241717931.

The spelling of 113115989 in words is "one hundred thirteen million, one hundred fifteen thousand, nine hundred eighty-nine".