Properties of the Number 16689

Sixteen Thousand Six Hundred Eighty-Nine

Basics

Value: 16688 → 16689 → 16690

Parity: odd

Prime: No

Previous Prime: 16673

Next Prime: 16691

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 5563

Divisors: 1, 3, 5563, 16689

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100000100110001

Octal: 40461

Duodecimal: 97A9

Hexadecimal: 4131

Square: 278522721

Square Root: 129.18591254467339

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

Number of fixed hexagonal polyominoes with n cells. A1207

T(n,k)=Number of (n+2)X(k+2) 0..4 arrays with every consecutive three elements in every row and diagonal having exactly two distinct values, and in every column and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order. A252961

Boustrophedon transform of 1,1,2,4,8,16,32,... A734

Lower (1/2)-midsequence of (2ⁿ) and F(n), where F = A000045 (Fibonacci numbers); see Comments. A390559

Upper (1/2)-midsequence of (2ⁿ) and F(n), where F = A000045 (Fibonacci numbers); see Comments. A390560

Numbers n such that n divides the (left) concatenation of all numbers <= n written in base 22 (most significant digit on right). A61975

Ascending sequence of numbers such that the sum of any two distinct elements (even + odd) is a prime number. A180743

Number of free poly-IH7-tiles (holes allowed) with n cells. A212416

Number of (n+2)X(1+2) 0..4 arrays with every consecutive three elements in every row and diagonal having exactly two distinct values, and in every column and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order. A252954

Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 86. A31584