What is the greatest 7 digit number without repeating any digit?

Answer 1

I am number greater than 70 000 but less than 90 000.My ones digit is the only even prime number.My tens digit id the same as my ones digit.My ten thousands digit is four times my ones digits.Both my hundreds and thousands digits are half the ten thousands digits.What number am i?

Answer 2

how about
9876543 ?

Answer 3

part b:
xxxxx
ones is even prime: 2
xxxx2
tens=ones = 2
xxx22
10K = 4*ones = 8
8xx22
100,1K = 8/2 = 4
84422