326.js

/** ------------------------------------------------------------------------------
 * 
 * 326. Power of Three
 * Topics: Math
 * https://leetcode.com/problems/power-of-three/description/?envType=daily-question&envId=2025-08-13
 * 
 ------------------------------------------------------------------------------ */
/**
 * @param {number} n
 * @return {boolean}
 */
var isPowerOfThree = function (n) {
  if (n <= 0) return false
  while (n % 3 === 0) {
    n /= 3
  }
  return n === 1
}

console.log(isPowerOfThree(27))