Properties of the Number 9989

Nine Thousand Nine Hundred Eighty-Nine

Basics

Value: 9988 → 9989 → 9990

Parity: odd

Prime: No

Previous Prime: 9973

Next Prime: 10007

Digit Sum: 35

Digital Root: 8

Palindrome: No

Factorization: 7 × 1427

Divisors: 1, 7, 1427, 9989

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011100000101

Octal: 23405

Duodecimal: 5945

Hexadecimal: 2705

Square: 99780121

Square Root: 99.94498486667553

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

Numbers in which 9 outnumbers all other digits together. A292739

a(n) = n⁴ - n - 1. A126423

Numbers k such that k, k+2, k+4, k+6, k+8 are semiprimes. A92127

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

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 2 and no row sum 0 and no column sum 0. A255091

Numbers which have only digits 8 and 9 in base 10. A256341

Numbers whose smallest decimal digit is 8. A284069

Numbers that are the sum of nine fourth powers in exactly seven ways. A345849

Number of non-isomorphic multiset partitions of weight n in which each of the parts and each part of the dual, as well as both the multiset union of the parts and the multiset union of the dual parts, is an aperiodic multiset. A320806

The difference between the number of partitions of 2n into odd parts (A000009) and the number of partitions of 2n into even parts (A035363). A282893