Thirty four

The thirty-four (34) is the natural number that follows thirty-three and precedes thirty-five.

Math

• It is a composite number, which has the following factors: 1, 2 and 17. As the sum of its own factors is 20 ≤ 34, it is a defective number.
• It is the ninth term of Fibonacci succession, after 21 and before 55.
• It's the magic constant of a magical square of 4 × 4.
• A semi-press number.
• Free number of squares.
• Erdős-Woods number.
• Heptagonal number.
• It's a number of accompanying Pell.

Science

• Selenium atomic number (Se).
• Object of the New General Catalog M34 is an open cluster in the constellation of Perseus.