Yes, 123456789 is a multiple of 3.
To find out if it's a multiple of 3, you add the digits. In this case you would add 1+2+3+4+5+6+7+8+9=45. Now you take that 45 and divide by 3. If there is no remainder it is a multiple but if there is a remainder it is not a multiple. So in this case 45/3=15 with no remainder.
you get cheese
324536
123456789+987654321+123456789+987654321=100
1.524157875019052e+16
123456789*1
Yes, 123456789 is a multiple of 9
15,241,578,750,190,521
Any multiple of 2520.
1, 3 and 9
370370367
123456789 + 123456789 = 246913578
3 and 9. And they divide into 123456789 whether or not you use divisibility rules!
1, 3, 9, 3607, 3803, 10821, 11409, 32463, 34227, 13717421, 41152263, 123456789 3, 3607 and 3803 are prime.
numbers :P
123456789
the answer is 15241578750190521
you get cheese