113889 has 4 divisors (see below), whose sum is σ = 151856. Its totient is φ = 75924.

The previous prime is 113843. The next prime is 113891. The reversal of 113889 is 988311.

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 not a de Polignac number, because 113889 - 2⁷ = 113761 is a prime.

It is a D-number.

It is a Duffinian number.

113889 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 (113809) 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, 18979 + ... + 18984.

It is an arithmetic number, because the mean of its divisors is an integer number (37964).

2¹¹³⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

113889 is a deficient number, since it is larger than the sum of its proper divisors (37967).

113889 is an equidigital number, since it uses as much as digits as its factorization.

113889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37966.

The product of its digits is 1728, while the sum is 30.

The square root of 113889 is about 337.4744434768. The cubic root of 113889 is about 48.4723333899.

The spelling of 113889 in words is "one hundred thirteen thousand, eight hundred eighty-nine".