Properties of the Number 16690

Sixteen Thousand Six Hundred Ninety

Basics

Value: 16689 → 16690 → 16691

Parity: even

Prime: No

Previous Prime: 16673

Next Prime: 16691

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 5 × 1669

Divisors: 1, 2, 5, 10, 1669, 3338, 8345, 16690

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100000100110010

Octal: 40462

Duodecimal: 97AA

Hexadecimal: 4132

Square: 278556100

Square Root: 129.18978287774928

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

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00010001. A260207

Triangle read by rows: T(n, k) = A084029(n, k)/n. A84033

Coordination sequence for Cr3Si, Cr position. A9928

Numbers k such that the continued fraction for sqrt(k) has period 51. A20390

Partial sums of A253090. A255603

Number of (n+2) X (2+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00000000 00000001 or 00010001. A260201

Number of length n arrays of permutations of 0..n-1 with each element moved by -6 to 6 places and the average of every three consecutive elements is never greater than the median of the previous three elements. A263732

Decimal expansion of log(67). A16690

a(n) = ∑_k=0..n binomial(2·k,k)/(k+1)*binomial(2·n-1,n-k). A279013