Properties of the Number 89985

Eighty-Nine Thousand Nine Hundred Eighty-Five

Basics

Value: 89984 → 89985 → 89986

Parity: odd

Prime: No

Previous Prime: 89983

Next Prime: 89989

Digit Sum: 39

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 7 × 857

Divisors: 1, 3, 5, 7, 15, 21, 35, 105, 857, 2571

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101111110000001

Octal: 257601

Duodecimal: 440A9

Hexadecimal: 15f81

Square: 8097300225

Square Root: 299.97499895824654

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

a(n) = (n-1)*(n-2)*(n²+9·n+12)/24. A323847

a(n) = 225·n² - 15. A158559

a(n) = n * (10·n² - 6n + 1) = n·A087348(n). A104099

a(n) = A089709(n+1)/A089709(n). A89985

Number of decompositions of 2·n >= 4 into an unordered sum of two primes, n - d and n + d, such that d < sqrt(2·n - 1). A338274