Memorize Prime Numbers 與 What Numbers:number theory 使用情況與統計

With this application, you can quickly find out what number the number corresponds to. For example, if you search for "7", the app will tell you if the number is a prime number, a palindrome number, a happy number, a harshad number, etc. ・Corresponding Number Theory Prime number Fibonacci number Palindrome number Armstrong number Happy number Sad number Circular Prime Number Perfect Square Perfect Cube Harshad Number Duck Number Spy Number Automorphic number Strobogrammatic Number Disarium Number Emirp Number ・Functions 1. when you enter a number, you can immediately determine what the number theory is. 2. displays a modal with the meaning of the number theory and an example when tapped. ・Displays a modal with the meaning of the number theory and an example when tapped. === 1. Prime number 2. A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. 3. Example: 2,3,5,7... === 1. Harshad Number 2. A Harshad number is a number that is divisible by the sum of its digits. 3. Example: 18... === 1. Armstrong number 2. An Armstrong number is a number that is equal to the sum of cubes of its digits. 3. Example: 153,370,371,407... === 1. Palindrome number 2. A palindrome number is a number that is the same when read forwards or backwards. 3. Example: 121,12321... === 1. Automorphic number 2. An automorphic number is a number whose square "ends" in the same digits as the number itself. 3. Example: 5, 6, 25, 76, 376, 625 === 1. Emirp Number 2. An emirp number is a prime number that results in a different prime when its digits are reverse. 3. Example: 13, 17, 31, 37...