Properties of the Number 19909

Nineteen Thousand Nine Hundred Nine

Basics

Value: 19908 → 19909 → 19910

Parity: odd

Prime: No

Previous Prime: 19891

Next Prime: 19913

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 43 × 463

Divisors: 1, 43, 463, 19909

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100110111000101

Octal: 46705

Duodecimal: B631

Hexadecimal: 4dc5

Square: 396368281

Square Root: 141.09925584495477

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

Centered cube numbers: n³ + (n+1)³. A5898

T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 1 0 and 1 0 1 vertically. A207519

Row sums of the triangular array A246694. A246695

Number of integers with a shortest addition-multiplication chain of length n. A383002

Nonprimes k such that k divides 3^k-1 - 2^k-1. A73631

a(n) = A050443(n-th prime)/(n-th prime). A52338

Semiprime centered cube numbers: m³ + (m+1)³. A180082

a(n) = n·prime(prime(n)) - prime(n)². A230098

Totally multiplicative sequence with a(p) = a(p-1) + 9 for prime p. A166706

Centered cuboctahedral numbers: the number of integer triples (x,y,z) such that max(|x|,|y|,|z|) <= n and |x|+|y|+|z| <= 2n. A371532