289009 has 16 divisors (see below), whose sum is σ = 362880. Its totient is φ = 224640.

The previous prime is 289001. The next prime is 289019. The reversal of 289009 is 900982.

It is a happy number.

289009 is nontrivially palindromic in base 14.

It is a cyclic number.

It is not a de Polignac number, because 289009 - 2³ = 289001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (289001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5427 + ... + 5479.

It is an arithmetic number, because the mean of its divisors is an integer number (22680).

2²⁸⁹⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

289009 is a deficient number, since it is larger than the sum of its proper divisors (73871).

289009 is a wasteful number, since it uses less digits than its factorization.

289009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 289009 is about 537.5955728984. The cubic root of 289009 is about 66.1155764912.

It can be divided in two parts, 28900 and 9, that multiplied together give a square (260100 = 510²).

The spelling of 289009 in words is "two hundred eighty-nine thousand, nine".