Hummer scored nine points during a 17-5 run for the Tigers (11-7, 4-0) at the end of the first half that produced a 29-17 halftime advantage.
Princeton, which shot 54.8 percent (23 of 42) and made 8 of 13 from 3-point range, never led by fewer than 12 in the second half.
Koon and T.J. Bray, who finished with 14 points, each made 6 of 7 shots for Princeton, and Hummer was 6 of 10.
Hummer now has 1,455 career points, good for fourth on Princeton's all-time list. He passed Craig Robinson, the brother-in-law of President Obama, who had been fifth, and Pete Campbell.
Rafael Maia scored 19 points for the Bears (8-11, 2-3), who shot 38 percent (19 of 50), including 1 of 12 on 3-pointers.
With intel from NBA GMs, Chad Ford checks in with the draft tier rankings. See how all the top prospects shake out in the eyes of NBA teams.
Approaching the draft, we have a new top three and a shakeup in the lottery, with teams starting to make their final decisions. Get the latest in Chad Ford's mock draft.
Duke freshman point guard Derryck Thornton Jr. is transferring to USC, his father announced on Friday to Scout.com.