289945 has 8 divisors (see below), whose sum is σ = 351936. Its totient is φ = 229296.

The previous prime is 289937. The next prime is 289951. The reversal of 289945 is 549982.

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 289945 - 2³ = 289937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234 + ... + 796.

It is an arithmetic number, because the mean of its divisors is an integer number (43992).

2²⁸⁹⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

289945 is a deficient number, since it is larger than the sum of its proper divisors (61991).

289945 is a wasteful number, since it uses less digits than its factorization.

289945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671.

The product of its digits is 25920, while the sum is 37.

The square root of 289945 is about 538.4654120740. The cubic root of 289945 is about 66.1868747234.

Adding to 289945 its sum of digits (37), we get a palindrome (289982).

The spelling of 289945 in words is "two hundred eighty-nine thousand, nine hundred forty-five".