- Is 22 a happy number?
- What is a Smith number in Java?
- What is the happiest number?
- What are happy and sad numbers?
- What is a Krishnamurthy number in Java?
- What is vampire number in Java?
- What is bouncy number?
- What are not prime numbers?
- Why is 11 not a prime number?
- How can you tell a prime number?
- What is the smallest prime number?
- How do you find Automorphic numbers?

## Is 22 a happy number?

, and so on.

For example, starting with 7 gives the sequence 7, 49, 97, 130, 10, 1, so 7 is a happy number.

…

The first few happy numbers are 1, 7, 10, 13, 19, 23, 28, 31, 32, 44, 49, 68, 70, 79, 82, 86, 91, 94, 97, 100, ….

## What is a Smith number in Java?

36.3K subscribers. Question: A Smith number is a composite number, the sum of whose digits is the sum of the digits of its prime factors obtained as a result of prime factorization (excluding 1). The first few such numbers are 4, 22, 27, 58, 85, 94, 121…

## What is the happiest number?

What is the happiest number between 1 and 1,000,000. Defined the happiest number as the smallest number that finds the most other happy numbers with it, i.e. 7 found four other numbers (49, 97, 130, and 10) making it a rank 4 in happiness.

## What are happy and sad numbers?

The numbers for which the process of summing up of the squares of its digits ends in 1 are happy numbers. On the other hand, numbers that don’t end in 1 are called unhappy or sad numbers.

## What is a Krishnamurthy number in Java?

Last Updated: 18-05-2020. A Krishnamurthy number is a number whose sum of the factorial of digits is equal to the number itself. For example 145, sum of factorial of each digits: 1!

## What is vampire number in Java?

In number theory, a vampire number (or true vampire number) is a composite natural number with an even number of digits, that can be factored into two natural numbers each with half as many digits as the original number and not both with trailing zeroes, where the two factors contain precisely all the digits of the …

## What is bouncy number?

A bouncy number is any non-negative integer that is neither increasing nor decreasing. … Unlike an increasing or decreasing integer, a bouncy number’s digits neither increase or decrease. Rather, they “bounce” between increasing and decreasing.

## What are not prime numbers?

Nonprime numbers are integers that are not prime numbers, i.e. zero (0), units (e.g. one (1), minus one (–1)), composite numbers and the associates of prime numbers (negated primes). Some nonprime numbers are –2563, 1, 48 and 1729.

## Why is 11 not a prime number?

For 11, the answer is: yes, 11 is a prime number because it has only two distinct divisors: 1 and itself (11). As a consequence, 11 is only a multiple of 1 and 11.

## How can you tell a prime number?

Prime numbers are numbers that have only 2 factors: 1 and themselves. For example, the first 5 prime numbers are 2, 3, 5, 7, and 11. By contrast, numbers with more than 2 factors are call composite numbers.

## What is the smallest prime number?

The smallest prime numbers are 2, 3, 5, 7, 11, 13, 17, 19 and 23. The number 2 is the only even prime number. The number 7 has only two factors: 1 and itself.

## How do you find Automorphic numbers?

Steps to Check Automorphic Number in JavaTake a number as input (num).Square the number (sqr).Count the number of digits of (num) using while loop (c).Compare the last (c) digits of (sqr) with the (num).If they are equal then the number is Automorphic else not.