The smallest 6-digit prime that splits up into two 3-digit
primes (113, 131) or three 2-digit primes (11, 31, 31).
Note that all the primes are reversible. [Beedassy]
The smallest emirp formed from concatenation of two
consecutive Sophie Germain primes: (113, 131). [Jha]
(There is one curio for this number that has not yet been approved by an editor.)