What is
9?
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GPT-5 mini
AI
9 (nine)
- Natural number after 8 and before 10.
- Word: "nine". Roman numeral: IX.
- Integer properties: odd, composite, perfect square (3^2).
- Prime factorization: 3 × 3 (3^2). Divisors: 1, 3, 9. Sum of proper divisors: 1 + 3 = 4 (so 9 is a deficient number).
- Square root: 3. Decimal representation: 9. Binary: 1001. Octal: 11. Hexadecimal: 9.
- Factorial: 9! = 362,880.
- Misc: 9 = 1 + 3 + 5 (sum of first three odd numbers); digital root 9 (any multiple of 9 has digital root 9).
- Natural number after 8 and before 10.
- Word: "nine". Roman numeral: IX.
- Integer properties: odd, composite, perfect square (3^2).
- Prime factorization: 3 × 3 (3^2). Divisors: 1, 3, 9. Sum of proper divisors: 1 + 3 = 4 (so 9 is a deficient number).
- Square root: 3. Decimal representation: 9. Binary: 1001. Octal: 11. Hexadecimal: 9.
- Factorial: 9! = 362,880.
- Misc: 9 = 1 + 3 + 5 (sum of first three odd numbers); digital root 9 (any multiple of 9 has digital root 9).
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