Properties of the Number -197

One Hundred Ninety-Seven

Basics

Value: -198 → -197 → -196

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 197

Divisors: 1, 197

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: -11000101

Octal: -305

Duodecimal: -145

Hexadecimal: -c5

Square: 38809

Square Root: 14.035668847618199

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

Alternating sum σ(1)-σ(2)+σ(3)-σ(4)+...+((-1)ⁿ⁺¹)*σ(n). A68762

Numbers k in pairs (j,k), with j <> k +- 1, such that the sum of their cubes is equal to a centered cube number. A352136

Second numbers F = a(n) of two non-consecutive numbers (E, F) different from (C, D) = (A352222(n), A352223(n)), such that the sums of their cubes are equal to centered cube numbers and to at least one other sum of two cubes, i.e. A = B³ + (B+1)³ = C³ + D³ = E³ + F³. A352225

Expansion of (1 - x)/(1 - 2·x + 3·x²) in powers of x. A87455

a(n) = 2ⁿ * ∑_k=0..n k^p*q^k, where p=2, q=-1/2. A232603

Signed super-Catalan or little Schroeder numbers. A80243

a(n) = -n² + 9·n + 23. A126719

Main diagonal of A279928. A281266

E.g.f. A(x) satisfies: [x^n-1] A(x)^n³ = [xⁿ] A(x)^n³ for n>=1. A296172

a(n) = (a(n-1)*a(n-3) - a(n-2)²) / a(n-4), with a(0) = 0, a(1) = a(2) = a(3) = 1, a(4) = -1. A50512