Number Cross

123456789
Across
  1. 3. in binary
  2. 5. miles in km
  3. 7. multiple of 97
  4. 9. area code near Los Angeles
Down
  1. 1. in a regular baseball game
  2. 2. (Roman numerals for 752)
  3. 4. prime number
  4. 6. palindrome
  5. 8. A × 4