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<p><b>New page</b></p><div>'''Seven''' is a [[natural number]] following [[six]] and preceding [[eight]]. It is a [[prime number]], and is often considered lucky in various cultures and religions. <br />
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==Etymology==<br />
The word "seven" comes from the [[Old English]] word "seofon," which is derived from the [[Proto-Germanic]] "sebun." Similar words for seven are found in other [[Germanic languages]], such as "sieben" in [[German]], "zeven" in [[Dutch]], and "sju" in [[Swedish]].<br />
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==Mathematics==<br />
In [[mathematics]], seven is the fourth [[prime number]]. It is not only a [[Mersenne prime]] (since 2^3 − 1 = 7) but also a double Mersenne prime as it is itself the exponent for another Mersenne Prime (2^7 − 1 = 127). Seven is the first [[integer]] reciprocal with infinitely repeating sexagesimal representation.<br />
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==Symbolism==<br />
Seven is a significant number in various religions and cultures. In [[Judaism]], there are seven days of [[Creation]], and the [[Menorah]] has seven branches. In [[Christianity]], God rested on the seventh day, and seven virtues and seven sins are often mentioned. In [[Islam]], there are seven heavens and seven layers of the Earth. In [[Chinese culture]], there are seven emotions: joy, anger, anxiety, adoration, grief, fear, and hate.<br />
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==In popular culture==<br />
The number seven is often used in literature, film, music, and other forms of media. Examples include the [[Seven Wonders of the Ancient World]], the [[Seven Dwarfs]] in Snow White, and the seven books in the [[Harry Potter]] series.<br />
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==See also==<br />
* [[Number theory]]<br />
* [[Numerology]]<br />
* [[Cultural depictions of the number seven]]<br />
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[[Category:Numbers]]<br />
[[Category:Mathematics]]<br />
[[Category:Symbolism]]<br />
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