Properties of the Number 83881

Eighty-Three Thousand Eight Hundred Eighty-One

Basics

Value: 83880 → 83881 → 83882

Parity: odd

Prime: No

Previous Prime: 83873

Next Prime: 83891

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 7 × 23 × 521

Divisors: 1, 7, 23, 161, 521, 3647, 11983, 83881

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100011110101001

Octal: 243651

Duodecimal: 40661

Hexadecimal: 147a9

Square: 7036022161

Square Root: 289.6221676598668

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 for which A276085(k) is a multiple of 3125, where A276085 is fully additive with a(p) = p#/p. A377878

Expansion of (1-x)*(2·x²+2·x+1) / ((x²-x-1)*(x²+x+1)). A111734

a(0)=a(1)=1, a(n+2) = a(n+1) + a(n) - A128834(n). A226956

Let p = n-th prime == 3 mod 8; a(n) = sum of quadratic residues mod p that are > p/2. A282722

Number of circular binary sequences of length n with an odd number of 0's and no consecutive 1's. A366043

a(n) = Lucas(n) - floor(Lucas(n)/2). A173495

Expansion of (1-x+x³)/(1-x²+2·x³-x⁴). A226447

Clique covering number, independence number, and Shannon capacity of the n-Lucas cube graph. A364587

a(n) = 6·a(n-1) - 6·a(n-2), with a(0)=1, a(1)=3. A83881

Fixed points of the operation x->(max_d(x)+min_d(x))/2, where max_d(x) iteratively replaces each digit d of·from left to right with the largest of the d digits to its right (itself included), and similarly for min_d. A173646