This number is a prime.
The song "Re-Make/Re-Model" from Roxy Music's eponymous debut album contains the esoteric chorus "CPL 593H" (referring to a British license plate).
The only three-digit Leyland prime (593 = 92 + 29). [Astle]
The number on the conning tower of the submarine USS Wayne in the movie "The Spy Who Loved Me."
593 = 2^(3*3) + 3^(2*2). [Silva]
Largest known prime of its form, total number of inequivalent Latin squares (or isotopy classes of Latin squares) of order n, for n from 1 through 7. That is, 1 + 1 + 1 + 2 + 2 + 22 + 564 = 593 is prime. [Post]
593 can be expressed using its own digits in the form 9^(5-3)+(5-3)^9. [Silva]
The Hubble Space Telescope is a robotic telescope located on the outer edge of the atmosphere, in circular orbit around the Earth at 593 kilometers above sea level. [Loungrides]
There are 593 distinct sums of three distinct odd primes with distinct prime digits. [Gaydos]
The sum of digits of the Leyland prime 593 equals the previous Leyland prime. [Gudipati]