962963domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumbers k such that k and k^2 use only the digits 2, 3, 6, 7 and 9.at n=15A137089Primes formed by concatenating n with n+1 and by concatenating n+2 with n+3.at n=29A256176Prime numbersat n=75843