Properties of the Number 43989

Forty-Three Thousand Nine Hundred Eighty-Nine

Basics

Value: 43988 → 43989 → 43990

Parity: odd

Prime: No

Previous Prime: 43987

Next Prime: 43991

Digit Sum: 33

Digital Root: 6

Palindrome: No

Factorization: 3 × 11 × 31 × 43

Divisors: 1, 3, 11, 31, 33, 43, 93, 129, 341, 473

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1010101111010101

Octal: 125725

Duodecimal: 21559

Hexadecimal: abd5

Square: 1935032121

Square Root: 209.73554777385735

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

The Wiener index of the Dutch windmill graph D(5,n) (n>=1). A180579

Second smallest multiple of n whose digits sum to n. A245065

a(1) = 1; a(n) = a(n-1) + 2·a(floor(n/2)). A347027

Roman numerals for n evaluated as if in base 36. A73421

Numbers k such that 4 and 8 occur juxtaposed in the base-9 representation of k but not of k+1. A43989