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fortyseven

Forty-seven is the natural number that comes after forty-six and before forty-eight. It is written as 47 in decimal notation.

In mathematics, 47 is a prime number; specifically it is the 15th prime. It is a safe

In words, the standard form is forty-seven; though "fortyseven" is seen in some contexts, the conventional spelling

In geography, the 47th parallel north is a circle of latitude that passes through several countries; many

In popular culture, the number has appeared as a recurring meme in Star Trek and elsewhere, though

See also: 47 (disambiguation); prime numbers; safe primes.

prime
because
(47
−
1)/2
=
23
is
prime.
Its
binary
representation
is
101111;
octal
57;
hexadecimal
2F;
Roman
numeral
XLVII.
uses
a
hyphen
between
the
tens
and
units.
places
are
named
or
numbered
with
47
in
numerals.
the
origin
and
extent
of
the
usage
vary
by
source.