289989 has 12 divisors (see below), whose sum is σ = 478816. Its totient is φ = 165672.

The previous prime is 289987. The next prime is 289999. The reversal of 289989 is 989982.

289989 is nontrivially palindromic in base 14.

It is not a de Polignac number, because 289989 - 2¹ = 289987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 289989.

It is not an unprimeable number, because it can be changed into a prime (289987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2239 + ... + 2364.

2²⁸⁹⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

289989 is a deficient number, since it is larger than the sum of its proper divisors (188827).

289989 is a wasteful number, since it uses less digits than its factorization.

289989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4616 (or 4613 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 289989 is about 538.5062673730. The cubic root of 289989 is about 66.1902225712.

The spelling of 289989 in words is "two hundred eighty-nine thousand, nine hundred eighty-nine".