1579

This number is a prime.

+ The hull number of Cape Keltic in the Hallmark Hall of Fame movie Calm at Sunset. [Haga]

+ The mouth of a prime volcano. It is the smallest prime that remains prime when preceded and followed by one, two, three, or four 9's:

     1579 
    915799 
   99157999 
  9991579999
 999915799999
[Post]

+ The largest prime that consists of odd digits concatenated in ascending order. [Loungrides]

+ The smallest 4-digit prime, with distinct digits, whose alternating the two internal digits another prime is created, (1759), concatenated from two double-digit primes. [Loungrides]

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

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