The smallest 4-digit prime such that any substring of length 2 yields only distinct primes (11, 17, 71). [De Geest]
The smallest prime equal to the sum of two palindromic
Smith numbers (535, 636). [Loungrides]
The Oribatid mite can lift over 1171 times its own weight.
(There is one curio for this number that has not yet been approved by an editor.)