289 is the 9th Friedman number. Friedman numbers are numbers that can be written by using its own digits the exact number of times they show up in the number. This one can be expressed as (8+9)².[2]
289 is a perfect square being equal to 17². It is also the 7th number to only have 3 factors because it is a square of a prime number.
289 is the sum of perfect cubes. It is the sum of 1³+2³+4³+6³.
289 is equivalent to the sum of the first 5 whole numbers to their respective powers. It is equal to 0⁰+1¹+2²+3³+4⁴.
In technology
The area code 289 is shared with 905 in the area in southern Ontario surrounding the greater Toronto metropolitan area.[3]
The Fluke 289 True-RMS Industrial Logging Digital Multimeter with Trendcapture is a tool designed to find signal in certain areas. It has a graphic visualization of this information that it displays on its screen. It can store up to 15,000 data points.[4]
On February 2, 2021, Ariel Chahi grew a strawberry that weighed 289 g in Israel. It was 18cm long and 34cm in circumference. This was confirmed to be the world's heaviest strawberry.[6][7]
On December 2, 2022, the longest flight by a paper aircraft was achieved by Dillon Ruble, Nathaniel Erickson, and Garret Jensen at a distance of 289 ft.[8]
The 289th Engineer Combat Battalion was a combat engineer battalion during World War II in the United States. They participated in France and Germany, in particular the Battle of the Bulge, Rhineland Campaign, and the Invasion of Germany.[14]
289P/Blanpain is a comet that orbits the sun every 5.31 years. It was discovered by Jean-Jacques Blanpain.[15]
