187

This number is a composite.

The 187th prime , i.e., 1117, can be written as the concatenation of the prime factors of 187. Are there other such cases? [Capelle]

187^(1*8*7)+1+8+7 is prime. This is the smallest three-digit non-zero number with this property. There are only two such numbers, the other being 232. [Opao]