Properties of the Number -81047

Eighty-One Thousand Forty-Seven

Basics

Value: -81048 → -81047 → -81046

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 81047

Divisors: 1, 81047

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10011110010010111

Octal: -236227

Duodecimal: -3AA9B

Hexadecimal: -13c97

Square: 6568616209

Square Root: 284.68754802414526

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

Crystal ball sequence for hexagonal close-packing. A7202

Number of binary vectors of length n+1 beginning with 0 and containing just 1 singleton. A6367

a(n+1) is the smallest prime > a(n) such that the digits of a(n) are all (with multiplicity) contained in the digits of a(n+1), with a(1)=7. A242907

Prime quadruples: 3rd term. A136721

Primes of the form ∑_k=1..n φ(prime(k)). A101302

Lesser of twin primes p1 such that p1·p2-4 and p1·p2-6 are twin prime numbers. A174957

Primes p such that p + 2, 18·p² + 1, and 18*(p+2)² + 1 are all primes. A115272