Properties of the Number -2047

Forty-Seven

Basics

Value: -2048 → -2047 → -2046

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 23 × 89

Divisors: 1, 23, 89, 2047

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11111111111

Octal: -3777

Duodecimal: -1227

Hexadecimal: -7ff

Square: 4190209

Square Root: 45.24378410345447

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) = -a(n-1) - a(n-2) + a(n-3), a(0)=3, a(1)=-1, a(2)=-1. A73145

Expansion of 1/((1 - 2·x + 2·x²)*(1-x)). A77860

a(n) = 1 - n¹¹. A24009

Even-indexed terms of the binomial transform equal 1 and the odd-indexed terms of the second binomial transform equal 1. A90145

Irregular triangle read by rows: coefficients of polynomials V_n(x), highest degree terms first. A257597

a(n) = ∑_d∣n (-1)^d-1*d¹¹. A321550

Triangle read by rows: the negative terms of A163626. A245602

See Mathematica program. A130605

a(n) = 2ⁿ - 1. (Sometimes called Mersenne numbers, although that name is usually reserved for A001348.) A225

Fermat pseudoprimes to base 2, also called Sarrus numbers or Poulet numbers. A1567