Английская Википедия:313 (number)
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Шаблон:Refimprove Шаблон:Infobox number 313 (three hundred [and] thirteen) is the natural number following 312 and preceding 314.
Additionally, 313 is:
- a prime number
- a twin prime with 311
- a centered square number[1]
- a full reptend prime (and the smallest number which is a full reptend prime in base 10 but not in base 2 to 9)
- a Pythagorean prime
- a regular prime[2]
- a palindromic prime in both decimal and binary.
- a truncatable prime
- a weakly prime in base 5
- a happy number[3]
- an Armstrong number - in base 4 ( 3×42 + 1×41 + 3×40 = 33 + 13 + 33 )
- an index of a prime Lucas number.[4]
References
