Properties of the Number -8819

Eight Hundred Nineteen

Basics

Value: -8820 → -8819 → -8818

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 8819

Divisors: 1, 8819

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

7925 Try Today's Challenge

Representations

Binary: -10001001110011

Octal: -21163

Duodecimal: -512B

Hexadecimal: -2273

Square: 77774761

Square Root: 93.9095309327014

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

Triangle, read by rows, T(n,k,q) = c(k,q) + c(n-k,q) - c(n, q) where c(n,q) = ∏_j=1..n-1 ((q^j+1 - 1)/(q-1)) and q = 4. A172093

Derivative of log of A007360. A23892

Number of non-isomorphic intersecting set-systems of weight n. A306006

Primes of the form p·q + p + q, where p and q are two successive primes. A96342

a() = 1,3,... [ A037257 ], differences = 2,... [ A037258 ] and 2nd differences [ A037259 ] are disjoint and monotonic; adjoin next free number to 2nd differences unless it would produce a duplicate in which case ignore. A37257

Smallest prime p==3 (mod 8) such that Q(sqrt(-p)) has class number 2n+1. A2148

Primes p with q(p) + 1 also prime, where q(.) is the strict partition function (A000009). A234530

Triangle read by rows: T(n,k) is the number of permutations of [n] having k strong fixed blocks (see first comment for definition). A186373

Integers that can be expressed as the sum of consecutive primes in exactly 4 ways. A54999

Primes p(n) for which (p(n-1) + p(n+2)) / p(n) = 2. A119381