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The smallest prime number whose individual digits are composite perfect squares. [Thoms]
The smallest prime number that can be constructed by two concatenated perfect prime squares (2^{2} and 7^{2}). [Wagler] 449 is the 87th prime. Note that 4^{2} + 4^{2} + 9^{2} = 8^{2} + 7^{2}. [Punches] The smallest prime whose digits are all semiprimes. [Silva] Smallest zeroless prime whose every power contain the digit zero in it. [Gupta]
(There are 8 curios for this number that have not yet been approved by an editor.)
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