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17 is a prime number from 1-100. 17 has two factors, 1 and 17. It's said to be the number with the most syllables in a range of 13-19, thanks to seven, which has two syllables. It's the seventh prime number and the seventh prime number from 0-100. It's also the 3rd Fermat number.

17 Is considered unlucky in Italy, because 17's Roman Numerals are XVII which is an anagram of Vixi, which is Latin for "I lived", as in "I am dead". 17 Is also the age where one is considered a near adult, as you're an adult at 18.

## Proofs

• — 17 can be divided by 1.
• — 17 cannot be divided by 2-16.
• — 17 can be divided by 17.
• Therefore, 17 has 2 factors

## As an Exponent of Mersenne Number

217 - 1, which is the number 131,071, is a prime number. It is the 6th Mersenne Prime.

## ​Relationship with other odd numbers

### The numbers before

• The previous odd number, 15, is not a prime number. It's divisible by 3 and 5.
• The odd number previous to 15 is 13, a prime number.
• 13 and 17 are four numbers apart; therefore, they are cousin primes.
• The odd number previous to 13 is 11. 11 is a prime number.
• 11 and 17 are six numbers apart; therefore, they are sexy primes.

### The numbers after

• The next odd number, 19, is a prime number.
• There are no odd numbers between 17 and 19. As a result, they are twin primes.
• 21, the odd number following 19, is not a prime number. It is divisible by 3 and 7.
• 23, the odd number following 21, is a prime number.
• 17 and 23 are six numbers apart; therefore, they are sexy primes.

## Trivia

• It is the only sexy prime quintuplet (5, 11, 17, 23, 29) since all multiples of five (except itself) are composite numbers.