87 (number)

 ← 86 87 88 →
Cardinaleighty-seven
Ordinal87th
(eighty-seventh)
Factorization3 × 29
Divisors1, 3, 29, 87
Greek numeralΠΖ´
Roman numeralLXXXVII
Binary10101112
Ternary100203
Octal1278
Duodecimal7312

87 (eighty-seven) is the natural number following 86 and preceding 88.

In mathematics

87 is:

• the sum of the squares of the first four primes (87 = 22 + 32 + 52 + 72).
• the sum of the sums of the divisors of the first 10 positive integers.[1]
• the thirtieth semiprime,[2] and the twenty-sixth distinct semiprime[3] and the eighth of the form (3.q).
• 5! - 4! - 3! - 2! - 1! = 87

In other fields

Eighty-seven is also:

References

1. ^
2. ^ "A001358 - OEIS" . oeis.org. Retrieved 2020-08-10.
3. ^ "A006881 - OEIS" . oeis.org. Retrieved 2020-08-10.

Categories: Integers

Information as of: 11.06.2021 08:25:33 CEST

Source: Wikipedia (Authors [History])    License : CC-BY-SA-3.0

Changes: All pictures and most design elements which are related to those, were removed. Some Icons were replaced by FontAwesome-Icons. Some templates were removed (like “article needs expansion) or assigned (like “hatnotes”). CSS classes were either removed or harmonized.
Wikipedia specific links which do not lead to an article or category (like “Redlinks”, “links to the edit page”, “links to portals”) were removed. Every external link has an additional FontAwesome-Icon. Beside some small changes of design, media-container, maps, navigation-boxes, spoken versions and Geo-microformats were removed.

Please note: Because the given content is automatically taken from Wikipedia at the given point of time, a manual verification was and is not possible. Therefore LinkFang.org does not guarantee the accuracy and actuality of the acquired content. If there is an Information which is wrong at the moment or has an inaccurate display please feel free to contact us: email.