49 (number)

49 (forty-nine) is the natural number following 48 and preceding 50.

Template:Numbers 40s
Cardinal	49 forty-nine
Ordinal	49th forty-ninth
Factorization	$7^{2}\,\!$
Divisors	1, 7, 49
Roman numeral	XLIX
Binary	0110001
Hexadecimal	31

In mathematics

Forty-nine is the square of 7. It is a centered octagonal number, and a Somer pseudoprime based on 8.

It appears in the Padovan sequence, preceded by the terms 21, 28, 37 (it is the sum of the first two of these).

In science

• The atomic number of indium

Astronomy

• Messier object M49, a magnitude 10.0 galaxy in the constellation Virgo.

• The New General Catalogue object NGC 49, a spiral galaxy in the constellation Cetus.

• The Saros number of the solar eclipse series which began on -1248 February 22 and ended on 32 March 29. The duration of Saros series 49 was 1280.1 years, and it contained 72 solar eclipses.

• The Saros number of the lunar eclipse series which began on -1217 June 21 and ended on 81 August 8. The duration of Saros series 49 was 1298.1 years, and it contained 73 lunar eclipses.

In religion

• On the Hebrew calendar, the number of days of the Counting of the Omer
• The number of days and night Siddhartha Gautama spent meditating as a holy man

In other fields

Forty-nine is:

• The number of strings on a harp and the number of keys on a celesta
• I-49 is the designation for a US interstate highway in Louisiana
• The code for international direct dial phone calls to Germany
• In the title of Thomas Pynchon's novel The Crying of Lot 49
• In the title of the movie Ladder 49
• In the title of the movie 49 Up
• Funk #49, the title of a hit song by the James Gang
• Featured in the song title "49 Bye-Byes" in Crosby Stills and Nash's self-titled album
• Song: 'Days of 49” by Bob Dylan
• Bob Dylan CD: “Highway 49 Revisited”
• A 49 is a term used to describe a party after a Powwow usually held by the powwow dancers
• 49th State: Alaska
• NBC's "Today Show" Studio are located on 49th Street at Rockefeller Plaza
• New York’s Waldorf-Astoria Hotel is on 49th St. and Park Avenue
• At age 49, former PTL minister, Jim Bakker, sent to prison on fraud/tax evasion charges (1989)
• Roman numeral: XLIX
• Ernest Hemingway collection: The Fifth Column and The First Forty-Nine Stories

Sports

• '49er, the moniker of one who participated in the 1849 California Gold Rush, as well as the NFL's San Francisco 49ers
• Astros Larry Dierker's retired uniform #49
• New York Yankees Ron Guidry’s retired uniform #49
• Heavyweight boxer Rocky Marciano retired with a 49 -0 record (43 KOs)

Historical years

• 49 A.D., 49 B.C., 1949, 2049, etc.