3049
This number is a prime.
3049 remains prime for D = 0 to 4 in 3D0D4D9, i.e., 3000409, 3101419, 3202429, 3303439,
3404449. [Rivera]
Including zero and the negative numbers, there are a total
of 3049 integers with digits in strictly ascending order,
strictly descending order, or (for the single digit
numbers) both. [Gaydos]
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