289689 has 8 divisors (see below), whose sum is σ = 392832. Its totient is φ = 189840.

The previous prime is 289669. The next prime is 289717. The reversal of 289689 is 986982.

289689 is nontrivially palindromic in base 13.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 289689 - 2⁵ = 289657 is a prime.

It is a Curzon number.

289689 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 289689.

It is not an unprimeable number, because it can be changed into a prime (289669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 609 + ... + 974.

It is an arithmetic number, because the mean of its divisors is an integer number (49104).

2²⁸⁹⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

289689 is a deficient number, since it is larger than the sum of its proper divisors (103143).

289689 is a wasteful number, since it uses less digits than its factorization.

289689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647.

The product of its digits is 62208, while the sum is 42.

The square root of 289689 is about 538.2276470045. The cubic root of 289689 is about 66.1673896152.

The spelling of 289689 in words is "two hundred eighty-nine thousand, six hundred eighty-nine".