Your American History Reference Guide!
- 137 (number)

HistoryMania Information Site on 137 (number) American History American History Search        American History Browse welcome to our free resource site for all enthusiasts!

137 (number)

137 is the natural number following 136 and preceding 138.

CardinalOne hundred [and]
thirty seven
Ordinal137th
Factorizationprime
Roman numeralCXXXVII
Binary10001001
Hexadecimal89
Contents

Mathematics

One hundred thirty-seven is the 33rd prime number; the next is 139 , with which it comprises a twin prime.

Using two radii to divide a circle according to the golden ratio yields sectors of approximately 137° (the golden angle) and 222°.

137 is a strictly non-palindromic number, it is not palindromic in any base from base 2 to base 135.

Physics

The numerical value of the fine structure constant α, a dimensionless physical constant, is approximately 1/137. The physicist Arthur Eddington at one time thought α to be exactly 1/137, but careful measurements have shown this not to be the case: its value is currently estimated at 1/137.035 999 76(50).

Other fields

137 is also:

See also: 130s, list of numbers

External links

Last updated: 05-21-2005 21:10:37
The contents of this article are licensed from Wikipedia.org under the
GNU Free Documentation License. How to see transparent copy
Search | Browse | Contact | Legal info