title: Highest usable UNICODE character
body: <p>I'm writing a routine that saves large numbers to a file, but instead of writing the actual number as a string (eg. 999999), I'd like to use its equivalent UNICODE character (eg. ), regardless of whether it actually corresponds to a visible or recognizable character. Excluding surrogate pairs, does anyone know which numerical values correspond to a SINGLE Unicode character? I'm asking this since I noticed that certain numerical values correspond to a two-character Unicode code point. Ex. 999999 corresponds to , whereas 999998 corresponds to .</p>