Properties of the Number 19663

Nineteen Thousand Six Hundred Sixty-Three

Basics

Value: 19662 → 19663 → 19664

Parity: odd

Prime: No

Previous Prime: 19661

Next Prime: 19681

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 7 × 53 ²

Divisors: 1, 7, 53, 371, 2809, 19663

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100110011001111

Octal: 46317

Duodecimal: B467

Hexadecimal: 4ccf

Square: 386633569

Square Root: 140.2248194864233

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

Least k such that there are exactly n ways to choose a sequence of divisors, one of each element of the multiset of prime indices of k (with multiplicity). A355732

Numbers k such that σ(k) = ψ(k) + τ(k) + ω(k). A386637

Expansion of exp( ∑_n>=1 σ(8·n)*xⁿ/n ) in powers of x. A283120

Numbers k such that σ(k) = ψ(k) + ω(k)³. A390252

Numbers p²*q, p > q odd primes such that q does not divide p-1, and q does not divide p+1. A350421

Least positive integer b such that (n, b, n+b) is an abc-hit. A272236

Least positive integer b such that b > n and (n, b, n+b) is an abc-hit. A272239

Numbers k such that the squarefree part of k equals A062799(k). A69551

The main diagonal of the array of A141425 and its higher order differences. A141516

Index of first occurrence of n appearing twice in succession in van Eck's sequence (A181391), or 0 if it never occurs. A308782