Q: Is 77,800 a Prime Number?
A: No, 77,800 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 77800 can be evenly divided by 1 2 4 5 8 10 20 25 40 50 100 200 389 778 1,556 1,945 3,112 3,890 7,780 9,725 15,560 19,450 38,900 and 77,800, with no remainder.
Since 77,800 cannot be divided by just 1 and 77,800, it is not a prime number.