A Prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite. 645 is composite.
It is composite.
645 rounded to the nearest hundred is 600.
No
645 is a 3-digit number. A single digit in a number can have a place value. A number with several digits cannot.
An even number can be divided by 2 evenly. An odd number will have a remainder of 1 when divided by 2. 645 is an odd number.
645129 x 543 x 5 x 3
606
3665
No. It does not read backwards the same as it does forwards.
866-645-y100
By comparing the first three digits of the Social Security Number you can identify the state in which the subject resided at the time the number was issued.627-645 Texas449-467 Texas
606 is. It is the same backwards of forwards.