Properties of the Number -7989

Nine Hundred Eighty-Nine

Basics

Value: -7990 → -7989 → -7988

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 33

Digital Root: 6

Palindrome: No

Factorization: 3 × 2663

Divisors: 1, 3, 2663, 7989

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1111100110101

Octal: -17465

Duodecimal: -4759

Hexadecimal: -1f35

Square: 63824121

Square Root: 89.38120607823548

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

First differences of A066841. A140554

a(n) = ∑_k=0..n (-1)^k*A345652(k)*Stirling1(n, k). A350759

Numbers k such that 3^k - 2 is prime. A14224

a(n) = least k such that the remainder when 20^k is divided by k is n. A128160

a(n) = ∑_i=0..n ∑_j=0..i T(i,j), T given by A026519. A26533

Positive integers k such that (k+1)⁴ has a divisor congruent to -1 modulo k. A350916

T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without move-in move-out straight through or left turns. A221755

Non-palindromic balanced numbers in base 16. A256080

Numbers with rounded up arithmetic mean of digits = 9. A178369

a(0) = 9, a(1) = 9, and a(n) = 3·a(n-1) - a(n-2) - 4 for n >= 2. A350919