Q: Is 2,779,821 a Prime Number?
A: No, 2,779,821 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 2779821 can be evenly divided by 1 3 9 11 33 43 99 129 387 473 653 1,419 1,959 4,257 5,877 7,183 21,549 28,079 64,647 84,237 252,711 308,869 926,607 and 2,779,821, with no remainder.
Since 2,779,821 cannot be divided by just 1 and 2,779,821, it is not a prime number.