17 (number) facts for kids
This article is about the number seventeen. For the year, see 17.
Quick facts for kids
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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 | |||
| Senary | 256 | |||
| Octal | 218 | |||
| Duodecimal | 1512 | |||
| Hexadecimal | 1116 | |||
Seventeen is a special number. It is found right after sixteen and just before eighteen. Seventeen is an odd number, which means you cannot divide it evenly by two.
It is also the 7th prime number. A prime number is a whole number greater than 1 that has only two factors: 1 and itself. The prime numbers before 17 are 2, 3, 5, 7, 11, and 13.
In Roman numerals, which were used in ancient Rome, the number 17 is written as XVII.
Fun Facts About 17
Unlucky 17 in Italy
In Italy, the number 17 is sometimes thought to be an unlucky number. This is similar to how some cultures see the number 13 as unlucky. Because of this belief, some airlines, like Alitalia, used to skip row 17 on their planes.
Images for kids
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No row 17 in Alitalia planes
See also
In Spanish: Diecisiete para niños
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17 (number) Facts for Kids. Kiddle Encyclopedia.