289969 has 8 divisors (see below), whose sum is σ = 316008. Its totient is φ = 264960.

The previous prime is 289967. The next prime is 289973. The reversal of 289969 is 969982.

It can be written as a sum of positive squares in 4 ways, for example, as 113569 + 176400 = 337^2 + 420^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 289969 - 2¹ = 289967 is a prime.

It is a super-2 number, since 2×289969² = 168164041922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289967) 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, 399 + ... + 859.

It is an arithmetic number, because the mean of its divisors is an integer number (39501).

2²⁸⁹⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

289969 is a deficient number, since it is larger than the sum of its proper divisors (26039).

289969 is a wasteful number, since it uses less digits than its factorization.

289969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515.

The product of its digits is 69984, while the sum is 43.

The square root of 289969 is about 538.4876971668. The cubic root of 289969 is about 66.1887008642.

Adding to 289969 its product of digits (69984), we get a palindrome (359953).

The spelling of 289969 in words is "two hundred eighty-nine thousand, nine hundred sixty-nine".