81111119domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes which are 1 + strobogrammatic numbers A000787(n): the same upside down.at n=13A105268Primes such that the outer 2 digits are n and n+1 and all inner digits are 1, where 0 < n < 9.at n=4A108818Prime numbersat n=4730620