118989 has 20 divisors (see below), whose sum is σ = 193116. Its totient is φ = 72576.

The previous prime is 118973. The next prime is 119027. The reversal of 118989 is 989811.

118989 is nontrivially palindromic in base 14.

It can be written as a sum of positive squares in 2 ways, for example, as 8100 + 110889 = 90^2 + 333^2 .

It is not a de Polignac number, because 118989 - 2⁴ = 118973 is a prime.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118189) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 997 + ... + 1109.

2¹¹⁸⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

118989 is a deficient number, since it is larger than the sum of its proper divisors (74127).

118989 is a wasteful number, since it uses less digits than its factorization.

118989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 129 counting only the distinct ones).

The product of its digits is 5184, while the sum is 36.

The square root of 118989 is about 344.9478221413. The cubic root of 118989 is about 49.1853317368.

Adding to 118989 its sum of digits (36), we get a square (119025 = 345²).

The spelling of 118989 in words is "one hundred eighteen thousand, nine hundred eighty-nine".