JERMYN, Pa. (AP) -- What's the secret to a long life? Having an unlisted number. That's according to Leo Moskovitz, who just turned 109. The northeastern Pennsylvania resident jokes that God can't find him because his name has never appeared in the phone book. The Times-Tribune of Scranton reports (http://bit.ly/1krVTnS ) Moskovitz celebrated his birthday with friends and family at a restaurant on Sunday. People curious about his longevity often ask Moskovitz about his diet. He says he switches between oatmeal and eggs for breakfast -- but isn't sure if that's why he's lived so long. He says, "If I knew what the secret was, I'd patent it." Moskovitz and his 87-year-old wife, Ann, have been married for 45 years. They live in Jermyn.