111089989 has 4 divisors (see below), whose sum is σ = 111133260. Its totient is φ = 111046720.

The previous prime is 111089971. The next prime is 111090041. The reversal of 111089989 is 989980111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 989980111 = 23003 ⋅43037.

It can be written as a sum of positive squares in 2 ways, for example, as 74390625 + 36699364 = 8625^2 + 6058^2 .

It is a cyclic number.

It is not a de Polignac number, because 111089989 - 2¹¹ = 111087941 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 (111089189) 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, 17524 + ... + 23005.

It is an arithmetic number, because the mean of its divisors is an integer number (27783315).

Almost surely, 2^111089989 is an apocalyptic number.

It is an amenable number.

111089989 is a deficient number, since it is larger than the sum of its proper divisors (43271).

111089989 is an equidigital number, since it uses as much as digits as its factorization.

111089989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43270.

The product of its (nonzero) digits is 46656, while the sum is 46.

The square root of 111089989 is about 10539.9235765730. The cubic root of 111089989 is about 480.7193914829.

The spelling of 111089989 in words is "one hundred eleven million, eighty-nine thousand, nine hundred eighty-nine".