Properties of the Number -1897

Eight Hundred Ninety-Seven

Basics

Value: -1898 → -1897 → -1896

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 7 × 271

Divisors: 1, 7, 271, 1897

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11101101001

Octal: -3551

Duodecimal: -1121

Hexadecimal: -769

Square: 3598609

Square Root: 43.55456348076513

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

Expansion of (1+x)/(1-x²+x³). A124745

G.f. A(x) satisfies A(x) = 1 + x/A(x)³ * (1 - A(x) + A(x)⁴). A377706

Expansion of ∏_k>0 1/(∑_m>=0 x^k·m²). A320119

Padovan sequence (or Padovan numbers): a(n) = a(n-2) + a(n-3) with a(0) = 1, a(1) = a(2) = 0. A931

a(0) = 0, a(1) = a(2) = a(3) = 1; thereafter, a(n) = a(n-1) + a(n-2) + a(n-4). A5251

T(n,m) = number of 0..m-1 integer arrays v[1..n] of length n with all autocorrelation values sum(i){v[i]*v[i-k]} distinct for k in 0..n-1. A171307

Number of n-th generation triangles in the tiling of the hyperbolic plane by triangles with angles {π/2, π/3, 0}. A96231

Expansion of 1/(1-x²-x³). A182097

Number of partitions of n into parts >= 5. A185325

Coordination sequence for (2,6,6) tiling of hyperbolic plane. A265069