700 = 22 x 52 x 7.
700 is the sum of four consecutive primes: 700 = 167 + 173 + 179 + 181.
700 is a number that cannot be written as a sum of three squares.
700 is 221221 in base 3 and 2020 in base 7.
700 is the number of n-bead necklaces with four colors, for n = 7.
The first known recorded use of the zero in Europe occurred in the year 700.Source: Wikipedia
El 700 es hipotenusa de dos ternas pitagoricas:
ReplyDelete700^2=196^2+672^2
700^2=420^2+560^2
Si n es un racional donde (n+28)^2-(n+25)^2=700^2, resulta para n=489841/6, de donde
700^2+(4899991/6)^2=(490009/6)^2
Rafael Parra de Barcelona