The answer depends on what functions are permitted - if any.
If you simply mean the arrangement of digits, then the answer is 9,876,412.
But if, for example, powers are permitted, then 987614^2 = 975,381,412,996 is very much larger. And that is one of the smaller powers.
the largest five digit number that can be formed using the digits 7 and 9 is 97,000
772
9876543210, without using any mathemeatical operations.
The largest four-digit odd number that can be formed using the digits 1-9 is 9871. This number uses the highest available digits while ensuring the last digit is odd, which is necessary for the number to be classified as odd.
To form the largest odd number less than 500,000 using the digits 5, 6, 0, 1, 3, and 9 each only once, we need to ensure the number is odd, which means it must end in 1, 3, or 9. The largest possible arrangement of the remaining digits while keeping the number under 500,000 is 39651. Therefore, the largest odd number less than 500,000 that can be formed is 39651.
9650 is the largest formed by re-ordering the digits.
99997
99,997
Without using exponents or factorials, that's it.
943
the largest five digit number that can be formed using the digits 7 and 9 is 97,000
772
99997
It is 963.
651
985
9876543210, without using any mathemeatical operations.