Properties of the Number -85489

Eighty-Five Thousand Four Hundred Eighty-Nine

Basics

Value: -85490 → -85489 → -85488

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 34

Digital Root: 7

Palindrome: No

Factorization: 53 × 1613

Divisors: 1, 53, 1613, 85489

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10100110111110001

Octal: -246761

Duodecimal: -41581

Hexadecimal: -14df1

Square: 7308369121

Square Root: 292.3850201361212

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) = -a(n-2) + 2·a(n-4) - a(n-10). A89135

Strong pseudoprimes to base 2. A1262

Overpseudoprimes to base 2: composite k such that k = A137576((k-1)/2). A141232

Euler-Jacobi pseudoprimes: 2^(n-1/2) == (2 / n) mod n, where (2 / n) is a Jacobi symbol. A47713

Super-Poulet numbers: Poulet numbers whose divisors d all satisfy d∣2^d-2. A50217

Composite numbers k such that k == +-1 (mod 8) and 2^(k-1/2) == 1 (mod k). A6971

Fermat pseudoprimes to base 2 with two prime factors. A214305

Strong pseudoprimes to base 4. A20230

Strong pseudoprimes to base 8. A20234

Composite numbers k == 1 (mod 4) such that (1 + i)^k == 1 + i (mod k), where i = sqrt(-1). A270698