This number is a composite.
Asteroid 916 (also known as America) was discovered in 1915 by G. N. Neujmin. There are 7 letters in the asteroid's name and 7 letters in the discoverer's surname. Note that 916*1915+7*7 is prime. [Opao]
When 916 is raised to the sum of its digits and increased by one, the result is prime (i.e., 916^(9+1+6)+1 is prime). It is the largest such 3-digit number. [Opao]