Is 611 a prime number?
It is possible to find out using mathematical methods whether a given integer is a prime number or not.
For 611, the answer is: No, 611 is not a prime number.
The list of all positive divisors (i.e., the list of all integers that divide 611) is as follows: 1, 13, 47, 611.
For 611 to be a prime number, it would have been required that 611 has only two divisors, i.e., itself and 1.
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As a consequence:
For 611 to be a prime number, it would have been required that 611 has only two divisors, i.e., itself and 1.
However, 611 is a semiprime (also called biprime or 2-almost-prime), because it is the product of a two non-necessarily distinct prime numbers. Indeed, 611 = 13 x 47, where 13 and 47 are both prime numbers.
Is 611 a deficient number?
Yes, 611 is a deficient number, that is to say 611 is a natural number that is strictly larger than the sum of its proper divisors, i.e., the divisors of 611 without 611 itself (that is 1 + 13 + 47 = 61).