118689 has 4 divisors (see below), whose sum is σ = 158256. Its totient is φ = 79124.

The previous prime is 118687. The next prime is 118691. The reversal of 118689 is 986811.

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 an interprime number because it is at equal distance from previous prime (118687) and next prime (118691).

It is a cyclic number.

It is not a de Polignac number, because 118689 - 2¹ = 118687 is a prime.

It is a D-number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (118681) 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, 19779 + ... + 19784.

It is an arithmetic number, because the mean of its divisors is an integer number (39564).

2¹¹⁸⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

118689 is a deficient number, since it is larger than the sum of its proper divisors (39567).

118689 is an equidigital number, since it uses as much as digits as its factorization.

118689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39566.

The product of its digits is 3456, while the sum is 33.

The square root of 118689 is about 344.5126993305. The cubic root of 118689 is about 49.1439609161.

It can be divided in two parts, 1186 and 89, that added together give a triangular number (1275 = T₅₀).

The spelling of 118689 in words is "one hundred eighteen thousand, six hundred eighty-nine".