Show that 999,973 is not prime without using a calculator or computer.

Answer:The number 9,99,973 is not prime number as 13, 61 and 97 are factors of 999973 apart from 1 and the number itself.Step-by-step explanation:We have to check whether 999973 is a prime number or not.Prime factorization is a method where we break a number into product of prime numbers.We first prime factorize the given number:[tex]999973 = 13\times 13\times 61\times 97[/tex]Prime Number:A prime number is a natural number greater than 1 that cannot be formed by multiplying two smaller numbers. A natural number greater than 1 that is not prime is called a composite number.Thus, a prime number cannot have factor other than 1 and the number itself.Thus, we can say that the number 9,99,973 is not prime number as 13, 61 and 97 are factors of 999973 apart from 1 and the number itself.