Is 197 a prime number?

Prime Number Checker
Number

Is 197 a prime or composite number?

Answer

Number 197 is a Prime

197 has exactly two divisors — 1 and 197 — so it is a prime.

Primes up to √197

14² = 196 ≤ 197 < 225 = 15², so it is enough to try primes up to 14

  • ÷2 does not divide
  • ÷3 does not divide
  • ÷5 does not divide
  • ÷7 does not divide
  • ÷11 does not divide
  • ÷13 does not divide

none of the 6 primes up to 14 divides 197 — 197 is prime

Nearest primes: 193 and 199

Related Calculations

See Also

Prime numbers list

NumberIs Prime
177No: 3 × 59
179Yes
180No: 2² × 3² × 5
181Yes
182No: 2 × 7 × 13
183No: 3 × 61
184No: 2³ × 23
186No: 2 × 3 × 31
187No: 11 × 17
189No: 3³ × 7
191Yes
193Yes
194No: 2 × 97
195No: 3 × 5 × 13
196No: 2² × 7²
197Yes
199Yes
200No: 2³ × 5²
201No: 3 × 67
202No: 2 × 101
203No: 7 × 29
204No: 2² × 3 × 17
205No: 5 × 41
206No: 2 × 103
207No: 3² × 23
208No: 2⁴ × 13
209No: 11 × 19
210No: 2 × 3 × 5 × 7
211Yes
213No: 3 × 71

FAQ

Is 197 a prime or composite number?

Number 197 is a Prime

How many factors are in a number 197?

2

How to check if 197 is prime?

Divide 197 by the primes in order: 14² = 196 ≤ 197 < 225 = 15², so it is enough to try primes up to 14. None of the 6 primes up to 14 divides 197, so 197 is prime.

See Also