For a nine-digit number, the number in the ones place is 9, the number in the hundreds place is 6, and the sum of any three adjacent numbers is 17. What is this number?
一个九位数，它的个位上的数字是9，百位上的数字是6，任意相邻的三个数字之和都是17，这个数是多少．
<result>629_629_629</result>