89 is a Prime number which is only divisible by itself and 1.
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They are: 89 times 1 = 89 which is a prime number
1 x 89, 89 x 1
They are: 1*89*1 = 89
89 x 90 = 8010 which are two consecutive two digit numbers that equal 8010.
1 and 89, -1 and -89