7129

This number is a prime.

A prime that can be written as 9⁴ + 8³ + 7² + 6¹ + 5⁰. Each digit appears once, and only once. [Wagler]

One of the mysterious numbers found in Ed Leedskalnin's bedroom at Coral Castle Tower (near Homestead, Florida). Did this eccentric man rediscover the secrets of ancient pyramid building as he claimed? [Schuler]

(There is one curio for this number that has not yet been approved by an editor.)