Properties of the Number -426389

Four Hundred Twenty-Six Thousand Three Hundred Eighty-Nine

Basics

Value: -426390 → -426389 → -426388

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 426389

Divisors: 1, 426389

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1101000000110010101

Octal: -1500625

Duodecimal: -186905

Hexadecimal: -68195

Square: 181807579321

Square Root: 652.9846858847457

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

Markoff (or Markov) numbers: union of positive integers x, y, z satisfying x² + y² + z² = 3·x*y·z. A2559

Positive integers k such that (k+1)⁴ has a divisor congruent to -1 modulo k. A350916

Define C(n) by the recursion C(0) = 1 + I where I² = -1, C(n+1) = 1/(1+C(n)); then a(n) = (-1)ⁿ/Im(C(n)) where Im(z) is the imaginary part of the complex number z. A69921

a(0) = 2, a(1) = 5, and a(n) = 7·a(n-1) - a(n-2) - 4 for n >= 2. A350922

Markov numbers that are prime. A178444

Primes whose base-8 representation is a perfect square in base 10. A267490

a(n) = a(n-1) + a(n-3) + a(n-4), where a(0) = 2, a(1) = 2, a(2) = 1, a(3) = 1. A295690

The odd Markoff numbers. A388291

Primes of the form F(i)² + F(j)², where F() are Fibonacci numbers. A45703

Primes of the form 3n² + 2. A257163