Properties of the Number -9643

Six Hundred Forty-Three

Basics

Value: -9644 → -9643 → -9642

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 9643

Divisors: 1, 9643

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10010110101011

Octal: -22653

Duodecimal: -56B7

Hexadecimal: -25ab

Square: 92987449

Square Root: 98.19877799647

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

Partial sums of A299287. A299288

Primes congruent to 2 mod 31. A142006

Toothpick primes: primes in the toothpick sequence A139250. A139253

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 4 6 or 7. A252433

a(1)=0, a(2)=1; thereafter a(n) = A238823(n-1)-2·a(n-1)-a(n-2). A238824

Primes with distinct digits in descending order. A52014

Primes for which the weight as defined in A117078 is 23. A119504

a(n) = a(n-2) + a(n-3) + a(n-4), with initial values a(0) = 0, a(1) = 2, a(2) = 3, a(3) = 6. A1634

Prime number spiral (clockwise, Southwest spoke). A54568

Number of permutations of [n] with at least one strong fixed point (a permutation p of {1,2,...,n} is said to have j as a strong fixed point if p(k) < j for k < j and p(k) > j for k > j). A6932