The digits product of two digit has number four
Two consecutive two digit numbers that when multiplied give the product of 812 are 28 and 29.
The greatest two-digit prime number is 97. The lowest two-digit prime number is 11. The product of the two numbers is equal to 1067.
The only pair of positive single-digit numbers which give a product of 81 are 9 and 9.
There are only two prime numbers that are consecutive numbers, 2 and 3. Their product is 2 x 3 = 6. The first prime numbers are 2, 3, 5, and 7 and the only two consecutive prime numbers whose product is a single digit are 2 and 3. (The next two consecutive prime numbers, 3 and 5, have a two-digit product.)
679 is the product of the largest single-digit prime number and the largest two-digit prime number.
89 x 90 = 8010 which are two consecutive two digit numbers that equal 8010.
715 and 777
In any two-digit multiplication sum, for example, 3 x 2 = 6, the first digit is called the multiplier, the second digit is called a multiplicand, and the third digit, the answer, is the product.
It can have 4 digits, because the highest possible two digit numbers 99*99=9801.