Tuesday, March 16, 2010
623
623
= 7 x 89.
623
is a number that cannot be written as a sum of three squares.
623
- 6*2*3 and
623
+ 6*2*3 are prime numbers: 587 and 659.
623
is the sum of three distinct positive cubes: 623 = 4
3
+ 6
3
+ 7
3
.
A Uranus-Neptune conjunction in Virgo occurred in the year
623
.
Source:
Prime Curios!
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