cincocientos nueve
hope you're not referring to the area code, haha.
509 000 Five and nine hundred thousand
$509.00
$509,000,000.00
DIX
509 over 7 as a mixed number = 725/7
509/100
Translation: Cinco con nueve am
It is: 509 and 7/10
509.7 = 509 7/10
9.05
Five hundred nine thousand, one.
7.509 814 362 * 106