Properties of the Number 9939

Nine Thousand Nine Hundred Thirty-Nine

Basics

Value: 9938 → 9939 → 9940

Parity: odd

Prime: No

Previous Prime: 9931

Next Prime: 9941

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 3313

Divisors: 1, 3, 3313, 9939

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011011010011

Octal: 23323

Duodecimal: 5903

Hexadecimal: 26d3

Square: 98783721

Square Root: 99.69453345093702

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(1)=1, a(n) = -1 + n*∑_j=1..n-1 a(j). A82425

Positions of 3's in A264977; positions of 6's in A277330. A277713

Number of times the digit 6 appears in the first 10ⁿ decimal digits of sqrt(2), sometimes called Pythagoras's constant, counting after the decimal point. A322647

Constant term of the reduction by x² -> x+1 of the polynomial p(n,x) defined at Comments. A192969

Cycle of the inventory sequence (as in A063850) starting with n consists of prime numbers. A78970

a(n) = A000043(n)-2. A153798

Consecutive states of the linear congruential pseudo-random number generator (10924·s+11830) mod (2¹⁵+1) when started at s=1. A384150

a(n) = ceiling((n + 1/2)³). A34131

Expansion of (-x² + 3·x - 1)/(x³ - x² + 3·x - 1). A200752