Properties of the Number 6609

Six Thousand Six Hundred Nine

Basics

Value: 6608 → 6609 → 6610

Parity: odd

Prime: No

Previous Prime: 6607

Next Prime: 6619

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 2203

Divisors: 1, 3, 2203, 6609

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1100111010001

Octal: 14721

Duodecimal: 39A9

Hexadecimal: 19d1

Square: 43678881

Square Root: 81.29575634681062

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Numbers k such that k⁴ can be written as a sum of four positive 4th powers with no common factor. A39664

a(n) = 8·n² - 4·n - 3. A118057

Number T(n,k) of entries in the k-th last blocks of all set partitions of [n]; triangle T(n,k), n>=1, 1<=k<=n, read by rows. A286416

Array read by ascending antidiagonals. A(n, k) = (n-1)*Gould(k-1) + Bell(k) for n >= 0 and k >= 1, A(n, 0) = 1. A352682

Left-hand border of triangle A046937. A38561

Triangle read by rows. Same rule as Aitken triangle (A011971) except T(0,0) = 1, T(1,0) = 2. A46937

Numbers m such that (15m-4, 15m-2, 15m+2, 15m+4) is a prime quadruple. A112540

Expansion of (1+x)^1/3/(1+x-9·x⁴)^1/3. A98535

a(n) is the index of the first occurrence of n in A166006. A278737

a(n) is the smallest number that is the sum of n positive 6th powers in two ways. A343079