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4226 (another Prime Pages' Curiosity) |
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4226 = phi(4)^sigma(4) + phi(2)^sigma(2) + phi(2)^sigma(2)
+ phi(6)^sigma(6). Note that 4226 is the earliest
multi-digit number with this property. [Firoozbakht]
To link to this page use http://primes.utm.edu/curios/page.php?number_id=4641
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