723
Does subtraction come to mind, try it, you can do it, good luck!
Add 407 to 623 and you'll have your answer !... (It's more than a thousand !)
622
The Bold and the Beautiful - 1987 1-6203 was released on: USA: 23 November 2011
Days of Our Lives - 1965 1-6203 was released on: USA: 28 February 1990
only 1 and 623. 623 is not divisible by any number
409 + 623 = 1032
623
623
12406 is divisible by 2 which equals 6203
191