Properties of the Number -312689

Three Hundred Twelve Thousand Six Hundred Eighty-Nine

Basics

Value: -312690 → -312689 → -312688

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 13 × 67 × 359

Divisors: 1, 13, 67, 359, 871, 4667, 24053, 312689

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1001100010101110001

Octal: -1142561

Duodecimal: -130B55

Hexadecimal: -4c571

Square: 97774410721

Square Root: 559.1860155619058

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

Numerators of convergents to π. A2485

Numbers k such that sec(k) decreases monotonically to 1 (or cos(k) increases to 1). A46955

Numerator of best approximation to π with denominator <= 10ⁿ. A72398

Least positive integer multiples of angle·such that their direction cosines form a unit vector: ∑_k>0 cos(a(k)*x)² = 1, where a(1)=1, a(n+1)>a(n) and x=3-π/2. A80139

Integers in the interval [π*k - 1/k, π*k + 1/k] for some k > 0. A265735

Numerators of convergents to π using best rational approximation whose denominator is between consecutive powers of 2: [2ⁿ, 2ⁿ⁺¹-1], where n = 0, 1, 2, ... A325158

Solutions of x² = ceiling(x·r*floor(x/r)) where r=π. A92328

Numbers m such that 0 <= m·tan(m) < 1, ordered by |m|. A332095

a(n) is the numerator of the rational number with the smallest denominator that lies within 1/10ⁿ of π. A360366