Prime Factorization by the Ladder Method:
639 is divisible by 3, 639/3 = 213
213 is divisible by 3, 213/3 = 71
71 is a prime number
Prime Factorization of 639: 639 = 3 x 3 x 71
Prime Factorization of 639 in Exponential Form: 639 = 32 x 71
Prime Factorization of 639
The solution above and other related solutions were provided by the Prime Factorization Application.