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Aziz Inan is a professor teaching in the electrical engineering program of the Donald P. Shiley School of Engineering at University of Portland.

Prince Philip, the Duke of Edinburgh, died April 9 (4/9/2021). He was 99.

Philip was a member of the British royal family as the husband of Queen Elizabeth II. He was born in Corfu, Greece, on June 10, 1921, but his family was exiled when he was 18 months old.

If Philip was alive, he would have turned 100 on June 10.

I prepared the following numerical curiosities in his honor:

1. Philip died on the 99th day of this year at age 99.

2. The sum of the prime factors of the day he died, 942021, equals 3+17+47+131 = 198 = 2 x 99.

3. Further, if 942021 is split as 94, 20, and 21, the sum of these three numbers equals 135. If numbers 1 through 26 are assigned to letters A through Z, the sum of the letter numbers of Prince Philip also equals 135.

4. Philip died on 9/4 and if split as 9 and 4, the product of the 9th and 4th prime numbers, namely 23 and 7, equals 161. Interestingly, Philip's 100th birthday, 6/10/2021, coincides with the 161st day of 2021.

5. Additionally, the sum of the 7th and 23rd prime numbers, namely 17 and 83, equals 100, signifying Philip's centennial birthday.

6. Lastly, Philip's centennial birthday 10/6/2021 is numerically special: if split as 106 and 2021, twice the reverse of 106, namely 601, equals 1202 and 1202 is the reverse of 2021.

I hope you rest in peace, Prince Philip. Amen.

Aziz Inan is a professor teaching in the electrical engineering program of the Donald P. Shiley School of Engineering at University of Portland and he can be reached at This email address is being protected from spambots. You need JavaScript enabled to view it..

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