Martin Seiferth added 13 points and eight rebounds for the Eagles (4-11, 2/3 Big Sky), and Thomas Reuter had seven assists. Eastern Washington committed 19 turnovers and shot just 8 of 20 from the free-throw line, but overcame that by hitting 8 of 17 3-pointers and shooting 50 percent overall from the field.
DeWayne Russell led Northern Arizona (5-10, 2-3) with 17 points, and Michael Dunn had 11.
The Lumberjacks scored the first seven points of the game before the Eagles rallied and took the lead at 16-15 on a jumper by Jois. Chiverton later added two 3-pointers and three free throws during a 16-1 run that put Eastern Washington ahead 32-18 with 4:18 left in the first half.
The Eagles' lead reached as many as 25 points in the second half.
Mike Brey is looking at former Notre Dame players to fill two assistant jobs that have opened up with the departures of Martin Ingelsby and Anthony Solomon.
Purdue's 2016-17 prospects got a jolt Wednesday when forward Caleb Swanigan announced he will return for his sophomore season.
Clemson's Jaron Blossomgame says he is withdrawing from the NBA draft and returning to school for a final season.