什么数：数论 : number theory 4+

使用此应用程序，您可以快速找出号码对应的号码。例如，如果您搜索“7”，该应用程序会告诉您该数字是质数、回文数、快乐数、harshad 数等。

・对应数论
质数
斐波那契数
回文数
阿姆斯壮数
快乐号
悲伤的数字
循环质数
完美广场
完美立方体
哈尔沙德号
鸭子号
间谍号
自守数
频闪数
Disarium 编号
帝国号

·职能
1.当你输入一个数字，你可以立即判断出什么是数论。
2. 显示具有数论含义的模态和点击时的示例。

・显示具有数论含义的模态和点击时的示例。

===
1.质数
2. 质数是大于 1 的自然数，除 1 和它本身外没有正约数。
3. 例子：2,3,5,7...
===
1. Harshad 数
2. Harshad 数是可被其数字之和整除的数。
3. 例子：18...
===
1. 阿姆斯壮数
2. 阿姆斯特朗数是等于其数字的立方之和的数。
3. 例子：153,370,371,407...
===
1.回文数
2. 回文数是正读或反读相同的数。
3. 例子：121,12321...
===
1. 自守数
2. 自守数是一个数字，其方块“结束”的数字与数字本身相同。
3. 例子：5、6、25、76、376、625
===
1. Emirp数
2. emirp 数是一个素数，当它的数字反转时会产生不同的素数。
3. 例子：13、17、31、37……


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...