Properties of the Number 16965

Sixteen Thousand Nine Hundred Sixty-Five

Basics

Value: 16964 → 16965 → 16966

Parity: odd

Prime: No

Previous Prime: 16963

Next Prime: 16979

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 5 × 13 × 29

Divisors: 1, 3, 5, 9, 13, 15, 29, 39, 45, 65

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100001001000101

Octal: 41105

Duodecimal: 9999

Hexadecimal: 4245

Square: 287811225

Square Root: 130.24976007655445

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 the k-th composition in standard order is a permutation (of an initial interval). A333218

Number of rooted simplicial 3-polytopes with n+3 nodes; or rooted 3-connected triangulations with 2n+2 faces; or rooted 3-connected trivalent maps with 2n+2 vertices. A260

Triangle read by rows: T(n,k) is the number of c-nets with n+1 faces and k+1 vertices. A290326

Array T(n,m) = 2*(2m+3)!*(4n+2m+1)!/(m!*(m+2)!*n!*(3n+2m+3)!) read by antidiagonals. A146305

Array read by antidiagonals: T(n,k) is the number of rooted strong triangulations of a disk with n interior nodes and 3+k nodes on the boundary. A341856

-3-Knödel numbers. A225507

a(n) = floor(C(n+8,8)/C(n+2,2)). A84631

Odd numbers n such that 2n/σ(n) - 1 = 1/x for some positive integer x. A222263

Largest member of the n-th row of the triangular triangle (A093445). A93446

Numbers k such that k divides ∑_j=0..k j^k-j. A341437