309 (number) explained

309 or three hundred nine is the natural number following 308 and preceding 310.

Cardinal:	three hundred nine
Ordinal:	309th(three hundred ninth)
Factorization:	3 × 103
Divisor:	1, 3, 103, 309
Roman:	CCCIX

In mathematics

• 309 is an odd composite number.
• 309 is composed of two distinct prime numbers multiplied (103 and 3).^[1]
• 309 is a Blum integer.^[2]
• 309 is a centered icosahedral number.^[3]

Notes and References

1. Web site: Apr 30, 2024 . Numbermatics: The Number Explorer . Apr 30, 2024 . Numbermatics.
2. Web site: Apr 30, 2024 . Blum Number . Apr 30, 2024 . PlanetMath.
3. Web site: Sloane . N. J. A. . May 1, 2024 . The On-Line Encyclopedia of Integer Sequences . May 1, 2024 . OEIS.