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.

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.

Oct 15, 2019 · Educational video for children to learn number 3. The little ones will learn how to trace number 3, how to pronounce it and also how to count with a series of super fun examples.

2 days ago · 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 (1!+2!=3).

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Feb 5, 2026 · Explore the hidden properties of 3, an odd prime number. Includes Prime Factorization, Divisors, Bases and Fun Facts for students, number lovers and curious minds.

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