Divide 463 (a prime) by 595 (a palindrome) to obtain an excellent approximation to the common logarithm of 6.
The smallest multidigit prime such that both the sum of digits and product of digits of its square remain square. [Russo]
463 on a cell phone is the numbers pressed to spell God. [Gregor]
The first prime whose digits form a scalene triangle with the smallest prime perimeter. [Beedassy]
There is a 4-6-3 double play in baseball. [Homewood]
A 463-tuple would be an "interesting constellation."
The only distinct-digit 3-digit prime which remains a prime after a prime digit is subtracted from any of its digits or from all of its digits simultaneously, i.e., 263, 443, 461, 241. [Loungrides]
(There are 7 curios for this number that have not yet been approved by an editor.)
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