The number 9999 is a four-digit integer that comes after 9998 and before 10000. It is often seen as a number that is close to the round number 10000. In various contexts, it can represent the maximum of a certain range, such as in numerical limits. In Roman numerals, 9999 is represented as _IXCMXCIX, where the underscores indicate multiplication by 1000 (indicating that each digit is multiplied by 1000).
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