Properties of the Number 8981

Eight Thousand Nine Hundred Eighty-One

Basics

Value: 8980 → 8981 → 8982

Parity: odd

Prime: No

Previous Prime: 8971

Next Prime: 8999

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 7 × 1283

Divisors: 1, 7, 1283, 8981

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001100010101

Octal: 21425

Duodecimal: 5245

Hexadecimal: 2315

Square: 80658361

Square Root: 94.76813810558906

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

Number of partitions of n for which the number of even parts is equal to the positive alternating sum of the parts. A277579

a(1) = 6; a(n) is smallest number >= a(n-1) such that the juxtaposition a(1)a(2)...a(n) is a prime. A46256

a(1) = 9; a(n) is smallest number > a(n-1) such that the juxtaposition a(1)a(2)...a(n) is a prime. A74345

Number of ways to write n as an ordered sum of 10 nonzero triangular numbers. A340955

Number of partitions of n² into squares greater than 1. A92362

Number of partitions p = [x(1), ..., x(k)], where x(1) >= x(2) >= ... >= x(k), of n such that max(x(i) - x(i-1)) >= number of parts of p. A241831

Numbers k such that there is more than one possible solution for A367338(k). A367346

If, for some m, A098550(m-2) is a prime p and A098550(m) = 7p, add 7p to the sequence. A253054

Numerators of continued fraction convergents to sqrt(411). A41780

Expansion of (1-x)^-1/(1-2·x²-2·x³). A77879