112989 has 4 divisors (see below), whose sum is σ = 150656. Its totient is φ = 75324.

The previous prime is 112979. The next prime is 112997. The reversal of 112989 is 989211.

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 112989 - 2¹² = 108893 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18829 + ... + 18834.

It is an arithmetic number, because the mean of its divisors is an integer number (37664).

2¹¹²⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

112989 is a deficient number, since it is larger than the sum of its proper divisors (37667).

112989 is an equidigital number, since it uses as much as digits as its factorization.

112989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37666.

The product of its digits is 1296, while the sum is 30.

The square root of 112989 is about 336.1383643680. The cubic root of 112989 is about 48.3443124748.

The spelling of 112989 in words is "one hundred twelve thousand, nine hundred eighty-nine".