This number is a prime.
The only left truncatable prime, with digits in descending order, concatenated from two double-digit primes. [Loungrides]
The largest 4-digit prime with its digits in descending order, whose sum of cubes of digits is prime, i.e., 9^3+7^3+4^3+3^3=1163. [Loungrides]
The largest distinct-digit prime concatenated from two
double-digit primes. [Loungrides]
(There are 3 curios for this number that have not yet been approved by an editor.)
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