35 is the 10th discretesemiprime ()[2] and the first with5 as the lowest non-unitary factor, thus being the first of the form (5.q) where q is a higher prime.
35 has twoprime factors, (5 and7) which also form its main factor pair (5 x 7) and comprise the secondtwin-prime distinctsemiprime pair.
The aliquot sum of 35 is13, within analiquot sequence of only one composite number (35,13,1,0) to the Prime in the13-aliquot tree. 35 is the secondcomposite number with the aliquot sum13; the first being the cube27.
35 is the last member of the first triple cluster of semiprimes33,34, 35. The second such triple distinct semiprime cluster is85,86, and87.[3]
35 is the number of ways that three things can be selected from a set of seven unique things, also known as the "combination of seven things taken three at a time".
The sentence "This sentence is thirty-five letters long" is 35 letters long (excluding spaces and hyphen), otherwise known as anautogram.
