Eighty-nine

Eighty-nine is the natural number following Eighty-eight and preceding Ninety. It is a prime number and has various mathematical and cultural significances.

Mathematical Properties

Eighty-nine is the 24th prime number, following Eighty-seven and preceding Ninety-one. It is also a Fibonacci number, being the 11th number in the Fibonacci sequence, which starts with 0 and 1. The sequence is defined by the recurrence relation:

F(n) = F(n-1) + F(n-2)

with seed values F(0) = 0 and F(1) = 1.

Eighty-nine is also a Lucas number, which is similar to the Fibonacci sequence but starts with 2 and 1. It is the 10th Lucas number.

Cultural Significance

In various cultures, the number eighty-nine can have different meanings and associations. For example, in some numerological systems, it is considered a number of introspection and humanitarianism.

Science and Technology

In the field of chemistry, the atomic number 89 corresponds to the element Actinium. Actinium is a radioactive element and is part of the actinide series.

Astronomy

In astronomy, 89 Julia is a large main-belt asteroid discovered by Édouard Stephan on August 6, 1866. It is named after Saint Julia of Corsica.

Sports

In sports, the number 89 is often worn by players in various sports leagues, particularly in American football and ice hockey.

Related Pages

• Prime number
• Fibonacci sequence
• Lucas number
• Actinium
• Main-belt asteroid
• American football
• Ice hockey