The Number 17
No odd Fibonacci Number is divisible by 17.
There are exactly 17 ways to express 17 as the sum of 1 or more primes. 17 is the only integer which is equal to the number of prime partitions of itself.
The Chemical Element Chlorine has an atomic number of 17.
There are 17 muscles in the Human tongue.
"The prime number 17 accommodates all the positive-negative, quanta-wave primes up to and including the number 18, which in turn accommodates the two nines of the invisible twoness of all systems." (Quoted from from Section 1238.43 of Synergetics by R. Buckminster Fuller.)
Some people believed that the Sky was divided into 17 celestial layers.
Jâbir Ibn Hayyân, in his book "Book of the Seventy" (Kitâb al-sab'în) attaches a very great importance to the numerical series: 1, 3, 5, 8 and 28 (the sum of 1, 3, 5 and 8 giving 17), because according to him: "All, in the universe, is governed by the number 17 - the metals for example have 17 'power'" and the form of any thing in the world is 17.
The Alhambra, splendid Moor palace which inspired Escher, has 17 types of mosaic (in fact all possible types).
For the ancient Greeks, 17 represents the number of consonants of the alphabet; it is divided in 9 (number of the dumb consonants) and in 8 (number of the semivowels or semi-consonants). These numbers were also in relation with the musical theory and the harmony of the spheres.
Frank Bunker Gibreth, the founder of modern motion study technique, concluded that the fundamental motions of the hands of a worker consists of 17 divisions.
King Tutankhamen was wrapped in 17 cloths.
The Year 17 ADIn the year 17 AD Ephesus and other cities were overturned by earthquake.
In the year 17 AD Germanicus of Rome celebrated a victory over the Germanic tribes
In the year 17 AD Ovid, the Roman poet died.
In the year 17 AD Livy, the Roman historian died.