Number 3 - properties and curiosities

3 (number)

Number 3 properties

3 is an odd number.
3 is a palindrome.
3 is a prime number, which means it is only divisible by 1 and itself.
3 is a Sophie Germain prime, which means that 2 x 3 + 1 = 7 is also a prime number.
3 is triangular and equals T2.
3 is an Armstrong (or Narcissistic) number, which means it is the sum of its own digits each raised to the power of the number of digits.
3 is Fibonacci number #4.
3 is a Harshad number, which means it is divisible by the sum of its digits (3 = 3, and 3 is divisible by 3).

Prime factorization

Prime factorization of 3: 3.

Divisor count: 2

1, 3

Factors of 3 are: 1, 3.

In octal, 3 is represented as 3.

In binary, 3 is represented as 11.

In hex, 3 is represented as 3.

Roman numeral: III

3 is part of the infinite sequence of prime numbers.
3 appears in the Fibonacci sequence, where each number is the sum of the previous two.
3 reads the same from left to right and right to left.

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Nearby primes: 2, 5, 7, 11

Is 3 prime?
Yes, 3 is prime.

What are the factors of 3?
1, 3

What is 3 in binary?
11