1952. Three Divisors

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Asked by 2 companies

Given an integer n, return true if n has exactly three positive divisors. Otherwise, return false.

An integer m is a divisor of n if there exists an integer k such that n = k * m.

Example 1:

Input: n = 2
Output: false
Explantion: 2 has only two divisors: 1 and 2.

Example 2:

Input: n = 4
Output: true
Explantion: 4 has three divisors: 1, 2, and 4.

Constraints:

Hint 1

You can count the number of divisors and just check that they are 3

Hint 2

Beware of the case of n equal 1 as some solutions might fail in it