M49 or M-49 may be:
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Messier 49, an elliptical galaxy in the constellation Virgo
* The 49th known
Mersenne prime
In mathematics, a Mersenne prime is a prime number that is one less than a power of two. That is, it is a prime number of the form for some integer . They are named after Marin Mersenne, a French Minim friar, who studied them in the early 1 ...
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M49 motorway, a motorway in Great Britain
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M49 (Cape Town), a Metropolitan Route in Cape Town, South Africa
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M49 (Johannesburg), a Metropolitan Route in Johannesburg, South Africa
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M49 telescope, a telescope used by the United States military
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M-49 (Michigan highway), a Michigan state highway
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UN M49
UN M49 or the Standard Country or Area Codes for Statistical Use (Series M, No. 49) is a standard for area codes used by the United Nations for statistical purposes, developed and maintained by the United Nations Statistics Division. Each area code ...
, the United Nations' "Standard Country or Area Codes for Statistical Use"
* M/49, or the Neuhausen pistol, the Danish name for the
SIG Sauer P210
The SIG P210 (Swiss Army designation Pistole 49, the civilian model was known as SP47/8 prior to 1957) is a locked breech self loading, semi-automatic pistol designed and manufactured in Neuhausen am Rheinfall (Canton of Schaffhausen, Switzerla ...
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