Is 679 a prime number?

Prime Number Checker
Number

Is 679 a prime or composite number?

Answer

Number 679 is not a Prime

679 = 7 × 97

679 has 4 divisors — 1, 7, 97 and 679; a prime has exactly two: 1 and itself.

Primes up to √679

26² = 676 ≤ 679 < 729 = 27², so it is enough to try primes up to 26

  • ÷2 does not divide
  • ÷3 does not divide
  • ÷5 does not divide
  • ÷7 divides

679 ÷ 7 = 97 — 7 divides 679, so 679 is composite

Nearest primes: 677 and 683

Related Calculations

See Also

Prime numbers list

NumberIs Prime
661Yes
662No: 2 × 331
663No: 3 × 13 × 17
665No: 5 × 7 × 19
666No: 2 × 3² × 37
667No: 23 × 29
668No: 2² × 167
669No: 3 × 223
671No: 11 × 61
672No: 2⁵ × 3 × 7
673Yes
674No: 2 × 337
675No: 3³ × 5²
677Yes
678No: 2 × 3 × 113
679No: 7 × 97
681No: 3 × 227
683Yes
684No: 2² × 3² × 19
689No: 13 × 53
690No: 2 × 3 × 5 × 23
691Yes
693No: 3² × 7 × 11
694No: 2 × 347
697No: 17 × 41
698No: 2 × 349
699No: 3 × 233
701Yes
702No: 2 × 3³ × 13
703No: 19 × 37

FAQ

Is 679 a prime or composite number?

Number 679 is not a Prime

How many factors are in a number 679?

4

How to check if 679 is prime?

Divide 679 by the primes in order: 26² = 676 ≤ 679 < 729 = 27², so it is enough to try primes up to 26. The first one that divides it is 7: 679 ÷ 7 = 97, so 679 is composite.

See Also