prime 1 - 9 are 5
prime 9-99 are 21
prime 99 - 999 are 143
prime 999-9999 are 1061
prime 9999-99999 are 8363
prime 99999-999999 are 68906
prime 999999-9999999 are 586081
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999999 ones in 999999
There are 449999 such numbers.
There are 90,000 such numbers.
There are 45 integers between 11 and 999999 which consist of only one digit being repeated. There are 831430 integers that contain at least one repeated digit.
How many days is 999999 hours?That would be about 41666 1/2 days!