11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97
Chat with our AI personalities
There are nine two-digit palindromes: 11, 22, 33, 44, 55, 66, 77, 88 and 99.
None. 1221 and 3443 are both 4-digit palindromes but no digit has remained the same between the two. First and fourth, second and third.
No two digit prime number exists that is a multiple of 7. All two digit numbers that are multiples of 7 are compositenumbers.
There are 21 two-digit prime numbers.
679 is the product of the largest single-digit prime number and the largest two-digit prime number.