Q: Is 997,780 a Prime Number?
A: No, 997,780 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 997780 can be evenly divided by 1 2 4 5 7 10 14 20 28 35 70 140 7,127 14,254 28,508 35,635 49,889 71,270 99,778 142,540 199,556 249,445 498,890 and 997,780, with no remainder.
Since 997,780 cannot be divided by just 1 and 997,780, it is not a prime number.