Properties of the Number 11649

Eleven Thousand Six Hundred Forty-Nine

Basics

Value: 11648 → 11649 → 11650

Parity: odd

Prime: No

Previous Prime: 11633

Next Prime: 11657

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 11 × 353

Divisors: 1, 3, 11, 33, 353, 1059, 3883, 11649

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10110110000001

Octal: 26601

Duodecimal: 68A9

Hexadecimal: 2d81

Square: 135699201

Square Root: 107.93053321465618

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

Pseudoprimes to base 10. A5939

24-gonal numbers: a(n) = n*(11·n-10). A51876

Number of ways to tile an n X n X n triangular area with two 2 X 2 X 2 triangular tiles and an appropriate number (= n²-8) of 1 X 1 X 1 tiles. A286437

a(n) = T(5,n), array T given by A048471. A36546

Composite numbers d such that the period k of the repetend of 1/d is > 1 and divides d-1, and d is the first such composite with a given period. A350220

a(1)=2; for n>1, a(n)=2·a(n-1)-1 if that number is composite, a(n)=a(n-1)+1 otherwise. A81869

Records in A105822. A104664

Triangle of coefficients, read by row polynomials P_n(y), that satisfy the g.f.: A038497(x,y) = ∏_n>=1 1/(1-xⁿ)^[P_n(y)/n], with P_n(0)=0 for n>=1 and P₀(0)=1. A96797

102nd cyclotomic polynomial. A11649

Smallest odd number k such that is equal to the sum of its proper divisors greater than k^1/n, or 0 if none exist. A182292