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|---|---|---|---|---|
| Cardinal | seventeen | |||
| Ordinal | 17th (seventeenth) |
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| Numeral system | septendecimal | |||
| Factorization | prime | |||
| Divisors | 1, 17 | |||
| Greek numeral | ΙΖ´ | |||
| Roman numeral | XVII | |||
| Binary | 100012 | |||
| Ternary | 1223 | |||
| Quaternary | 1014 | |||
| Quinary | 325 | |||
| Senary | 256 | |||
| Octal | 218 | |||
| Duodecimal | 1512 | |||
| Hexadecimal | 1116 | |||
| Vigesimal | H20 | |||
| Base 36 | H36 | |||
17 (seventeen) is the natural number following 16 and preceding 18. It is a prime number.
In spoken English, the numbers 17 and 70 are sometimes confused because they sound similar. When carefully enunciated, they differ in which syllable is stressed: 17 /sɛvənˈtiːn/ vs 70 /ˈsɛvənti/. However, in dates such as 1789 or when contrasting numbers in the teens, such as 16, 17, 18, the stress shifts to the first syllable: 17 /ˈsɛvəntiːn/.
The number 17 has wide significance in pure mathematics, as well as in applied sciences, law, music, religion, sports, and other cultural phenomena. 17 is the sum of the first 4 prime numbers.