Properties of the Number 19877

Nineteen Thousand Eight Hundred Seventy-Seven

Basics

Value: 19876 → 19877 → 19878

Parity: odd

Prime: No

Previous Prime: 19867

Next Prime: 19889

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 11 × 13 × 139

Divisors: 1, 11, 13, 139, 143, 1529, 1807, 19877

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100110110100101

Octal: 46645

Duodecimal: B605

Hexadecimal: 4da5

Square: 395095129

Square Root: 140.98581488930012

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

a(n) = A026615(2·n, n-1). A26617

Numbers n such that φ(n-1) + φ(n+1) = φ(2n). A67701

a(n) = (4·n+3)*(4·n+7). A85027

Composite squarefree numbers n such that p(i)+5 divides n-5, where p(i) are the prime factors of n. A225715

Numerators of the characteristic polynomials of the von Mangoldt function matrix. A260237

a(n) = (6·n+1)*(6·n+5). A1513

One half of sixth column (m=5) of triangle A060556. A60559

Integers n > 1997 such that the 'Reverse and Add!' trajectory of n joins the trajectory of 1997. A63055

Number of closed normal forms of size n in λ calculus with size 0 for the variables. A224345

Numbers k such that 4·k + 1 is a perfect cube, sorted by absolute values. A305290