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2. 7 - Wikipedia

   en.wikipedia.org/wiki/7

   7 (seven) is the natural number following 6 and preceding 8. It is the only prime number preceding a cube. As an early prime number in the series of positive integers, the number seven has greatly symbolic associations in religion, mythology, superstition and philosophy. The seven classical planets resulted in seven being the number of days in ...

3. 1729 (number) - Wikipedia

   en.wikipedia.org/wiki/1729_(number)

   1729 is the natural number following 1728 and preceding 1730. It is the first nontrivial taxicab number, expressed as the sum of two cubic numbers in two different ways. It is known as the Ramanujan number or Hardy–Ramanujan number after G. H. Hardy and Srinivasa Ramanujan.

4. 49 (number) - Wikipedia

   en.wikipedia.org/wiki/49_(number)

   Along with the number that immediately derives from it, 77, the only number under 100 not having its home prime known (as of 2016). The smallest triple of three squares in arithmetic succession is (1,25,49), and the second smallest is (49,169,289). 49 is the smallest discriminant of a totally real cubic field. [2]

5. List of numbers - Wikipedia, the free encyclopedia

   en.wikipedia.org/wiki/List_of_numbers

   A list of articles about numbers (not about numerals). Topics include powers of ten, notable integers, prime and cardinal numbers, and the myriad system.

6. 37 (number) - Wikipedia

   en.wikipedia.org/wiki/37_(number)

   37 is a prime number, [1] a sexy prime, and a Padovan prime 37 is the first irregular prime with irregularity index of 1. [2] 37 is the smallest non-supersingular prime in moonshine theory. 37 is also an emirp because it remains prime when its digits are reversed.

7. 73 (number) - Wikipedia

   en.wikipedia.org/wiki/73_(number)

   73 is Sheldon Cooper's favorite number in The Big Bang Theory. He first expresses his love for it in "The Alien Parasite Hypothesis", the 73rd episode of The Big Bang Theory. [22] Jim Parsons, who plays Cooper in the series, was born in 1973. [23] His character often wears a t-shirt with the number 73 on it. [24]

8. 13 (number) - Wikipedia

   en.wikipedia.org/wiki/13_(number)

   13 (thirteen) is the natural number following 12 and preceding 14.. Folklore surrounding the number 13 appears in many cultures around the world: one theory is that this is due to the cultures employing lunar-solar calendars (there are approximately 12.41 lunations per solar year, and hence 12 "true months" plus a smaller, and often portentous, thirteenth month).

9. 31 (number) - Wikipedia

   en.wikipedia.org/wiki/31_(number)

   31 is the 11th prime number. It is a superprime and a self prime (after 3, 5, and 7), as no integer added up to its base 10 digits results in 31. [1] It is the third Mersenne prime of the form 2 n − 1, [2] and the eighth Mersenne prime exponent, [3] in-turn yielding the maximum positive value for a 32-bit signed binary integer in computing: 2,147,483,647.