289045 has 4 divisors (see below), whose sum is σ = 346860. Its totient is φ = 231232.

The previous prime is 289039. The next prime is 289049. The reversal of 289045 is 540982.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 117649 + 171396 = 343^2 + 414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-289045 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289049) 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, 28900 + ... + 28909.

It is an arithmetic number, because the mean of its divisors is an integer number (86715).

2²⁸⁹⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

289045 is a deficient number, since it is larger than the sum of its proper divisors (57815).

289045 is an equidigital number, since it uses as much as digits as its factorization.

289045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57814.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 289045 is about 537.6290542744. The cubic root of 289045 is about 66.1183215752.

The spelling of 289045 in words is "two hundred eighty-nine thousand, forty-five".