Yes, APACHE is a Scrabble word!

Letter values in Scrabble US: A 1, P 3, A 1, C 3, H 4, E 1.

Is it a valid word?

APACHE is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

any member of Athapaskan tribes that migrated to the southwestern desert (from Arizona to Texas and south into Mexico); fought a losing battle from 1861 to 1886 with the United States and were resettled in Oklahoma
a Parisian gangster
the language of the Apache