Is 243 a unique number? 243 is the only 3-digit number that is a fifth power (35) a perfect totient number the sum of five consecutive prime numbers (41 + 43 + 47 + 53 + 59). Default sorting Sort by popularity Sort by average rating Sort by latest Sort by price: low to high Sort by price: high to low View: 30 60 All Quick View Sale! Quick View Federal .243 100Gr SP Powershok Ammunition – 243B $32.22 $28.22 Quick View Sale! Quick View Federal .243 70GR Ballistic Tip Ammunition – P243F $42.99 $38.99 Quick View Sale! Quick View Hornady .243 100GR BT SP Ammunition – 8046 $32.88 $28.88 Quick View Sale! Quick View Hornady .243 58GR V-Max Superformance Ammunition – 8343 $38.99 $34.99 Quick View Sale! Quick View Sako .243 90GR FMJ Speedhead Ammunition – 114E $33.99 $27.99 Quick View Sale! Quick View Sako .243 90Gr Gamehead SP Ammunition – 112E $31.99 $29.99