113689 has 4 divisors (see below), whose sum is σ = 118656. Its totient is φ = 108724.

The previous prime is 113683. The next prime is 113717. The reversal of 113689 is 986311.

It is a happy number.

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: 986311 = 883 ⋅1117.

It is a cyclic number.

It is not a de Polignac number, because 113689 - 2⁵ = 113657 is a prime.

It is a Duffinian number.

113689 is a lucky number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (113683) 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, 2449 + ... + 2494.

It is an arithmetic number, because the mean of its divisors is an integer number (29664).

2¹¹³⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

113689 is a deficient number, since it is larger than the sum of its proper divisors (4967).

113689 is an equidigital number, since it uses as much as digits as its factorization.

113689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4966.

The product of its digits is 1296, while the sum is 28.

The square root of 113689 is about 337.1779945370. The cubic root of 113689 is about 48.4439427434.

It can be divided in two parts, 1136 and 89, that added together give a triangular number (1225 = T₄₉).

The spelling of 113689 in words is "one hundred thirteen thousand, six hundred eighty-nine".