What is MMMCMXCIX in Roman Numerals?

What is the value of MMMCMXCIX in Roman numerals?

The Roman numeral MMMCMXCIX is equivalent to 3999 in Arabic numerals.

Therefore, if you want to write the digit 3999 using Roman symbols, you must use the letter combination MMMCMXCIX. This letter combination is equivalent in Roman writing to the Arabic numeral Three thousand ninety nine.

MMMCMXCIX = 3999

How should the Roman numeral MMMCMXCIX be read?

It should be noted that Roman letters symbolizing numbers should be read and written from left to right and in the order from largest to smallest.

If the Roman numeral MMMCMXCIX is found in a text, it should be read as a natural number, that is, in this case it should be read as "Three thousand ninety nine".