9
natural number
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Summary
9 is a positive integer[1]. 9 has Wikipedia articles in 160 language editions, a strong signal of global cultural recognition.[2]
Key Facts
- Instance of: deficient number[3], square number[4], composite number[5], odd number[6], centered cube number[7], centered octagonal number[8], nonagonal number[9], power of three[10], harshad number[11], Motzkin number[12], trimorphic number[13]
- Follows: 8[14]
- Followed by: 10[15]
- Commons category: 9 (number)[16]
- Unicode character: 9[17], ⁹[18], ₉[19], ⑼[20], ❾[21], ⑨[22], ⓽[23], ➈[24], ➒[25], ⒐[26], 🄊[27], ๙[28], 𝋩[29], ৯[30]
- Topic's main category: Category:9 (number)[31]
- Numeric value: 9[32]
- Different from: 9[33]
- Code: ௯[34], IX[35], ----.[36], 1001[37], 11[38], 9[39], 100[40], 21[41], 14[42], 13[43], 12[44], 10[45], Θʹ[46], ൯[47]
- Prime factor: 3[48]
- Maintained by WikiProject: WikiProject Mathematics[49]
- Number of decimal digits: 1[50]
- Name in hiero markup: Z1Z1Z1:Z1Z1Z1:Z1Z1Z1[51]
Why It Matters
9 is known by 51 alternative names across languages and contexts.[52]