Table of Contents

## What is Emirp number in Java?

Emirp Number: An emirp number is a number which is prime backwards and forwards. Example: 13 and 31 are both prime numbers. Thus, 13 is an emirp number.

## Is 7 an Emirp number?

The sequence of emirps begins 13, 17, 31, 37, 71, 73, 79, 97, 107, 113, 149, 157, 167, 179, 199, 311, 337, 347, 359, 389, 701, 709, 733, 739, 743, 751, 761, 769, 907, 937, 941, 953, 967, 971, 983, 991. All non-palindromic permutable primes are emirps.

**Which is an example of a prime number that Emirp works on?**

Some examples of emirp numbers are 13, 17, 31, 37, 71, 73, 79, 97, 107, 113, 149, and 157. Try reversing them and you’ll see that they make a new prime number! That’s all it takes to master emirp numbers!

**How do I find my Emirp number?**

Steps to find Emirp Number

- Read or initialize a number (n).
- First, check the given number (n) is prime or not. If not, break the execution and exit. If prime, find the reverse (r) of the given number (n).
- Check the reverse number (r) is prime or not. If not, print number (n) is not emirp.

### Is 13 an Emirp number?

Explanation : 13 and 31 are both prime numbers. Thus, 13 is an Emirp number.

### What is a mirror prime?

Mirror Primes are those which are reverse of each other.

**Where do I find my neon number?**

Steps to Find Neon Number Calculate the square of the given number (n) and store it in variable sq. Find the sum of the digits of the square (sq) and store the sum in the variable (sum). Compare the given number n with If both are equal, the given number is a neon number, else, not a neon number.

**What is Sheldon Cooper’s favorite number?**

73

Sheldon wearing a 73 shirt at The Cheesecake Factory. 73 is Sheldon Cooper’s favorite number in The Big Bang Theory. He first expresses his love for it in “The Alien Parasite Hypothesis”. Jim Parsons was born in the year 1973.

## What is the coolest prime number?

“The best number is 73,” Cooper explained in the episode. “Why? 73 is the 21st prime number. Its mirror, 37, is the 12th, and its mirror, 21, is the product of multiplying seven and three and in binary, 73 is a palindrome, 1001001, which backwards is 1001001.”

## When is a number called an emirp number?

A number is called an emirp number if we get another prime number on reversing the number itself. In other words, an emirp number is a number that is prime forwards or backward. It is also known as twisted prime numbers. Note: Palindrome primes are excluded. Suppose, we want to check the number 79 is emirp or not.

**What does it mean when emirp is spelled backwards?**

Emirp is the word “prime” spelled backwards, and it refers to a prime number that becomes a new prime number when you reverse its digits.

**Is the emirp prime the same as the reversible prime?**

An emirp ( prime spelled backwards) is a prime number that results in a different prime when its decimal digits are reversed. This definition excludes the related palindromic primes. The term reversible prime is used to mean the same as emirp, but may also, ambiguously, include the palindromic primes.

### What are the added properties of emirps x?

Emirps with added mirror properties There is a subset of emirps x, with mirror xm, such that x is the y th prime, and xm is the ym th prime. (E.g. 73 is the 21st prime number; its mirror, 37, is the 12th prime number; 12 is the mirror of 21.)