Keeping the place of 6 in the number 6350947 same, the smallest number obtained by rearranging other digits is

The number is 63, 50, and 947 in Indian number system.

The place of 6 is same i.e. ten lakhs.

Digits other than 6 are 3, 5, 0, 9, 4, and 7

To obtain the smallest number, arranging them in ascending order, i.e. 0, 3, 4, 5, 7 and 9

The required number is 6034579