129 in Roman numerals
CXXIX
The number 129 is written as CXXIX in Roman numerals.
More about the number 129
See the full profile of the number 129 — its prime factorization, divisors, number-theory properties and how it is written in Greek, Arabic, Chinese, Hebrew, Egyptian and Maya numerals.
Want the rules? Read the Roman numerals guide to see how the symbols combine.