Properties of the Number 16643

Sixteen Thousand Six Hundred Forty-Three

Basics

Value: 16642 → 16643 → 16644

Parity: odd

Prime: No

Previous Prime: 16633

Next Prime: 16649

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 11 × 17 × 89

Divisors: 1, 11, 17, 89, 187, 979, 1513, 16643

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100000100000011

Octal: 40403

Duodecimal: 976B

Hexadecimal: 4103

Square: 276989449

Square Root: 129.00775170508166

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 that are the sum of 6 positive 7th powers. A3373

Numbers that are the sum of 4 nonzero 4th powers in more than one way. A309763

Numbers that are the sum of four fourth powers in exactly two ways. A344193

Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 197", based on the 5-celled von Neumann neighborhood. A286648

Solution of the complementary equation a(n) = a(n-1) + 3·a(n-2) -2·a(n-3) - 2·a(n-4) + b(n-3), where a(0) = 1, a(1) = 2, a(2) = 3, a(3) = 4, b(0) = 5, b(1) = 6, b(2) = 7, b(3) = 8, and (a(n)) and (b(n)) are increasing complementary sequences. A295621

Square array A(n,k), n >= 1, k >= 0, read by antidiagonals: A(n,k) = ∑_d∣n sigma_k(d). A322103

Numerators of the partial sums of the reciprocals of the number of abelian groups function (A000688). A379359

a(0) = 1, a(n) = 9·n² + 2 for n>0. A10002

1/4 the number of (n+1) X 3 binary arrays with all 2 X 2 subblock sums the same. A183979

p-INVERT of (1,1,0,0,0,0,...), where p(S) = 1 - 3 S + S². A291415