The number classified as prime from the provided options is 29.
A prime number is defined as a natural number greater than 1 that has no positive divisors other than 1 and itself.
- 29 has two divisors: 1 and 29 (it is prime).
- 39 has divisors 1, 3, 13, and 39 (it is not prime).
- 49 has divisors 1, 7, and 49 (it is not prime).
- 69 has divisors 1, 3, 23, and 69 (it is not prime).