Twenty nine

The twenty-nine (29) is the natural number that follows 28 and precedes 30.

Math

• It's the 10th prime number, after 23rd and before 31.
• In the duodecimal system it is a narcissistic number.
• 29 = 5² + 2², inherent property because it is a pioneer number that are in the form 4n+1, where n is an integer.
• 2 is the minimum primitive root of 29.
• He is a cousin of Eisenstein without imaginary part and real part of the 3n - 1.
• Form a pair of twin prime numbers along with 31.
• It forms a triplet of sexy prime numbers (17, 23, 29).
• 5th cousin of Lucas.
• A Pell number.
• It's a prime number of Pillai.
• A Perrin number.
• 6th cousin Sophie Germain.
• 3.o strong prime number.
• 4th prime number of Ramanujan.
• 9th regular cousin.
• Størmer number.

Chemistry

• It is the atomic number of copper (Cu).

Astronomy

• The lunar month is very close to twenty-nine days.
• The number of days of February in a biased year.
• Saturn takes about 29 years to orbit the Sun.
• Object of Messier M29 an open cluster in the Cygnus constellation.
• Object of the New General Catalog NGC 29 is a spiral galaxy located in the Andromeda constellation.

Osteology

• The amount of bones in a normal human skull (See bone head).

Military technology

• The Boeing B-29 Superfortress was a heavy bomber.

Language

• The number of letters in alphabet: Turkish, Finnish, Swedish, Danish and Norwegian.

References and notes