What’s the secret to a long life? Eat oatmeal and eggs for breakfast and make sure you have an unlisted phone number.

That's the combination that has worked for Leo Moskovitz, a Pennsylvania man who celebrated his 109th birthday over the weekend.

While Moskovitz has certainly lived a long life, he couldn’t say for sure that his breakfast choices and decision not list his number in the phone book are the things that have kept him alive for so long.

"If I knew what the secret was, I'd patent it," the 109-year-old told the Scranton Times-Tribune.

Moskovitz joked that his unlisted phone number, which has never appeared in a phone book, may be stifling God’s plans.

“When the Lord is looking for help, he won't find your name there,” he said. “He can’t call you.”

But Moskovitz did say that his wife of 45 years, Ann, may have something to do with his longevity. She said the marriage has been “45 of the best years of my life.”

“I can almost say the same,” the 109-year-old quipped.

Moskovitz may need glasses and a hearing aid, but his sense of humor shows that he is still mentally sharp.

“As sharp as I am, I don't know how sharp that is. I change my razor blades every couple days,” he said.

A former bank president, Moskovitz still keeps in touch with current events by reading newspapers. But he said most of the time is spent with Ann, 87. The couple has lived in the same home in Jermyn, Pa., for the duration of their marriage.

“Ninety percent of what I get comes from Ann,” he said.