A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.
Let's check each of the numbers:
- 39: Divisible by 1, 3, 13, and 39 (not prime).
- 69: Divisible by 1, 3, 23, and 69 (not prime).
- 49: Divisible by 1, 7, and 49 (not prime; \(7 \times 7 = 49\)).
- 29: Divisible by 1 and 29 (prime).
So, the only prime number in the list is 29.