Properties of the Number -6419

Four Hundred Nineteen

Basics

Value: -6420 → -6419 → -6418

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 7 ² × 131

Divisors: 1, 7, 49, 131, 917, 6419

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: -1100100010011

Octal: -14423

Duodecimal: -386B

Hexadecimal: -1913

Square: 41203561

Square Root: 80.11866199581718

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) = ∑_{k=0..floor(n/7)} (-1)^k*binomial(n,7·k). A307041

First term of n-th difference sequence of (floor(k·r)), r = sqrt(3/4), k >= 0. A325732

First term of n-th difference sequence of (floor(2e·k)), k >= 0. A325736

E.g.f. A(x) satisfies A(x) = exp( x·cos(x·A(x)²) ). A381409

Number of partitions of 2n with all subsums different from n. A6827

Number of non-biquanimous integer partitions of n. A371795

Number of partitions of n with odd minimal and maximal parts. A325338

T(n,k)=Number of third differences of arrays of length n+3 of numbers in 0..k. A228260

Numbers that are the sum of nine fourth powers in exactly five ways. A345847

Number of polypons with n cells. A57784