609

609 is a natural number that follows 608 and precedes 610. It is an odd composite number.

Its prime factorization is 3 × 7 × 29. The positive divisors of 609 are 1, 3, 7, 21, 29, 87, 203, and 609, giving eight divisors in total. The sum of its proper divisors is 351, which is less than 609, so 609 is a deficient number.

In Roman numerals, 609 is written as DCIX. The digital root of 609 is 6 (6 + 0 + 9 = 15; 1 + 5 = 6). In scientific notation, 609 equals 6.09 × 10^2.

In telecommunications, 609 is used as a North American area code covering parts of central New Jersey.