Properties of the Number -1863

Eight Hundred Sixty-Three

Basics

Value: -1864 → -1863 → -1862

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ⁴ × 23

Divisors: 1, 3, 9, 23, 27, 69, 81, 207, 621, 1863

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11101000111

Octal: -3507

Duodecimal: -10B3

Hexadecimal: -747

Square: 3470769

Square Root: 43.162483709814474

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

O.g.f. A(x) satisfies: A(x) = 1 + Integral (x·A(x)⁸)' / (x·A(x)⁵)' dx. A302704

Numerators in the power series of a function f such that f(f(x)) = sin(x) where f(x) = ∑_n>=1 a(n)/2^n-1*x^2n-1/(2n-1)!. A98932

a(1) = 1; a(n) = -∑_{d∣n, d < n} A341512(n/d) * a(d), where A341512(n) = σ(n)*A003961(n) - n*σ(A003961(n)). A347096

Array read by rows: row n lists the coefficients of the characteristic polynomial of the n-th principal submatrix of max(2i-j, 2j-i), as in A204154. A204155

Shifts left by 3 places under series reversion. A309564

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 241", based on the 5-celled von Neumann neighborhood. A270991

Triangle read by rows: T(n,k) = (-1)^k*3^n-1-2k*binomial(n-k,k)*(4n-5k)/(n-k) (0 <= k <= floor(n/2), n >= 1). A104063

Riordan array ((1-x)/(1-3·x+3·x²), x/(1-3·x+3·x²)). A236311

Generalized 13-gonal numbers: m*(11·m-9)/2 with m = 0, 1, -1, 2, -2, 3, -3, ... A195313

Product of the 4th power of a prime (A030514) and a different prime (p⁴*q). A178739