600 (six hundred) is the natural number following 599 and preceding 601. Six hundred is a composite number, an abundant number, a pronic number and a Harshad number. In the United States, a credit score of 600 or below is considered poor, limiting available credit at a normal interest rate. NASCAR runs 600 advertised miles in the Coca-Cola 600, its longest race. The Fiat 600 is a car, the SEAT 600 its Spanish version. 601 = prime number, centered pentagonal number 602 = 2 × 7 × 43, nontotient, number of cubes of edge length 1 required to make a hollow cube of edge length 11, area code for Phoenix, AZ along with 480 and 623 603 = 32 × 67, Harshad number, Riordan number, area code for New Hampshire 604 = 22 × 151, nontotient, totient sum for first 44 integers, area code for southwestern British Columbia (Lower Mainland, Fraser Valley, Sunshine Coast and Sea to Sky) 605 = 5 × 112, Harshad number, sum of the nontriangular numbers between the two successive triangular numbers 55 and 66, number of non-isomorphic set-systems of weight 9. 606 = 2 × 3 × 101, sphenic number, sum of six consecutive primes (89 + 97 + 101 + 103 + 107 + 109), admirable number 607 – prime number, sum of three consecutive primes (197 + 199 + 211), Mertens function(607) = 0, balanced prime, strictly non-palindromic number, Mersenne prime exponent 608 = 25 × 19, Mertens function(608) = 0, nontotient, happy number, number of regions formed by drawing the line segments connecting any two of the perimeter points of a 3 times 4 grid of squares. 609 = 3 × 7 × 29, sphenic number, strobogrammatic number 610 = 2 × 5 × 61, sphenic number, nontotient, Fibonacci number, Markov number. Also a kind of telephone wall socket used in Australia. 611 = 13 × 47, sum of the three standard board sizes in Go (92 + 132 + 192), the 611th tribonacci number is prime 612 = 22 × 32 × 17, Harshad number, Zuckerman number , untouchable number, area code for Minneapolis, MN 613 (number) 613 = prime number, first number of prime triple (p, p + 4, p + 6), middle number of sexy prime triple (p − 6, p, p + 6).