The number 8139 in Roman numerals is written as VIIICXXXIX. Here’s the breakdown:

• 8000 in Roman Numerals: 8000 is represented by VIII. The VIII indicates 8, and the overline multiplies this by 1000, making it 8000.
• 100 in Roman Numerals: 100 is represented by C.
• 30 in Roman Numerals: 30 is represented by XXX. “X” stands for 10, so XXX is 10 + 10 + 10.
• 9 in Roman Numerals: 9 is represented by IX. “I” is 1, and “X” is 10. Placing “I” before “X” means 10 minus 1.

Combining these, VIIICXXXIX (8000 + 100 + 30 + 9) equals 8139.

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