289609 has 4 divisors (see below), whose sum is σ = 293760. Its totient is φ = 285460.

The previous prime is 289607. The next prime is 289637. The reversal of 289609 is 906982.

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 a cyclic number.

It is not a de Polignac number, because 289609 - 2¹ = 289607 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 289609.

It is not an unprimeable number, because it can be changed into a prime (289603) 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, 1969 + ... + 2110.

It is an arithmetic number, because the mean of its divisors is an integer number (73440).

2²⁸⁹⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

289609 is a deficient number, since it is larger than the sum of its proper divisors (4151).

289609 is an equidigital number, since it uses as much as digits as its factorization.

289609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4150.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 289609 is about 538.1533238771. The cubic root of 289609 is about 66.1612981648.

It can be divided in two parts, 289 and 609, that added together give a palindrome (898).

The spelling of 289609 in words is "two hundred eighty-nine thousand, six hundred nine".