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.

perfect number, a positive integer that is equal to the sum of its proper divisors. The smallest perfect number is 6, which is the sum of 1, 2, and 3. Other perfect numbers are 28, 496, and 8,128. The …

See the number 3 with objects that sometimes come to life for a fun surprise! This early math video works great as a "Number of the Day" lesson or as an exciting early math activity for preschool...

The number 3 is a natural number following 2 and preceding 4. It is an odd and prime number, often symbolically significant across different religions and cultures.

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.

Feb 14, 2026 · 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).

Three is an important number for many cultures (groups of people living together). It is also a prime number. It is the first odd prime. In Roman numerals, it is III. three gifts of the wise men (Magi) who …

The meaning of THREE is a number that is one more than 2. How to use three in a sentence.

Dec 21, 2025 · A West Arabic numeral, ultimately from Indic numerals (compare Devanagari ३ (3)), from a cursive form of three lines to represent the number three. See 3 § Evolution of the Arabic digit for …