The prime number among the options provided is 29.
A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. The other numbers (49, 39, and 69) have divisors other than 1 and themselves. For example:
- 49 = 7 × 7
- 39 = 3 × 13
- 69 = 3 × 23