49202147domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) = 5^n + 7^n + 9^n.at n=8A074575Prime numbers that are the sum of three distinct positive eighth powers.at n=4A126658Primes which are the sum of three nonzero 8th powers.at n=8A283019Prime numbersat n=2955962