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Is 89 a prime number?

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Is 89 a prime or composite number?

Answer

Number 89 is a Prime

89 has exactly two divisors — 1 and 89 — so it is a prime.

Primes up to √89

9² = 81 ≤ 89 < 100 = 10², so it is enough to try primes up to 9

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

none of the 4 primes up to 9 divides 89 — 89 is prime

Nearest primes: 83 and 97

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See Also

Factors of a Number - List all Factors and Factor Pairs of a Number
Prime Factorization - Prime Factorization Calculator
Prime Numbers List - List of all Prime Numbers - how many Prime numbers are between

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Is 89 a prime number? Is 89 a prime number? 89 is a prime number. Check if any number is prime or composite with our free online prime checker.

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Prime numbers list

Number	Is Prime
74	No: 2 × 37
75	No: 3 × 5²
76	No: 2² × 19
77	No: 7 × 11
78	No: 2 × 3 × 13
79	Yes
80	No: 2⁴ × 5
81	No: 3⁴
82	No: 2 × 41
83	Yes
84	No: 2² × 3 × 7
85	No: 5 × 17
86	No: 2 × 43
87	No: 3 × 29
88	No: 2³ × 11
89	Yes
90	No: 2 × 3² × 5
91	No: 7 × 13
92	No: 2² × 23
93	No: 3 × 31
94	No: 2 × 47
95	No: 5 × 19
96	No: 2⁵ × 3
97	Yes
98	No: 2 × 7²
99	No: 3² × 11
100	No: 2² × 5²
101	Yes
102	No: 2 × 3 × 17
103	Yes

FAQ

Is 89 a prime or composite number?

Number 89 is a Prime

How many factors are in a number 89?

2

How to check if 89 is prime?

Divide 89 by the primes in order: 9² = 81 ≤ 89 < 100 = 10², so it is enough to try primes up to 9. None of the 4 primes up to 9 divides 89, so 89 is prime.