3 (three) is a number, numeral and digit. It is the natural number following 2 and preceding 4, and is the smallest odd prime number and the only prime preceding a square number. [citation …

Three is the first odd prime number, and the second smallest prime. It is both the first Fermat prime (2 2º + 1) and the first Mersenne prime (2² - 1), as well as the first lucky prime.

Dec 19, 2025 · The number 3 is a very mystical and spiritual number featured in many folktales (three wishes, three guesses, three little pigs, three bears, three billy goats gruff).

THREE definition: a cardinal number, 2 plus 1. See examples of three used in a sentence.

Explore the curious properties of number 3, an odd number which is prime. Includes mathematical info, prime factorization, divisors, bases and much more! A fascinating reference for students, …

Properties of the number 3: factors, prime check, fibonacci check, bell number check, binary, octal, hexadecimal representations and more.

Jan 3, 2026 · Translations [edit] show ± cardinal number 3 show ± describing set or group with three components

Dec 22, 2025 · 3 is the only integer which is the sum of the preceding positive integers (1+2=3) and the only number which is the sum of the factorials of the preceding positive integers …

Many cultures around the world see the number three as important or special. The number three appears in many famous stories, beliefs, and traditions. Here are some examples: The Three …

Gemini is the third astrological sign of the Zodiac. (May 21 – June 21) Number three is the number of Jupiter.