There are two interpretations of what you are asking in the way you have written your question:
1. what is 923458 divided by 1000: 923458 ÷ 1000 = 923.458
2. What digit is in the thousands place value column: this column is the 4th to the left of the decimal point which is hiding at the right hand end; thus the thousands digit is the 3.
Thousands and thousands and thousands............
To many to count! Thousands upon thousands.
1,049.753 thousands.
1,000
700,000 thousands.
Thousands and thousands
4,280 thousands.
5 thousands
3.785 thousands.
120,000 thousands
600.572 thousands.
2,000,000 thousands.