CXXXVII is the Roman numeral representation for the number 137. Roman numerals are a numeral system originating from ancient Rome, using combinations of letters from the Latin alphabet. In this system, "C" stands for 100, "X" for 10, and "VII" for 7, which together add up to 137. The number 137 holds significance in various fields, including science and mathematics. For instance, it is known as the approximate value of the fine-structure constant, a fundamental physical constant that characterizes the strength of electromagnetic interactions. This constant is crucial in quantum mechanics and helps explain the behavior of particles like electrons and photons.