Properties of the Number 6439

Six Thousand Four Hundred Thirty-Nine

Basics

Value: 6438 → 6439 → 6440

Parity: odd

Prime: No

Previous Prime: 6427

Next Prime: 6449

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 47 × 137

Divisors: 1, 47, 137, 6439

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1100100100111

Octal: 14447

Duodecimal: 3887

Hexadecimal: 1927

Square: 41460721

Square Root: 80.24337978923869

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

Number of integer partitions of n with reverse-alternating sum >= 0. A344607

Number of integer partitions of 2n with reverse-alternating sum >= 0. A344611

a(n) = floor(n*φ¹²), where φ is the golden ratio, A001622. A4927

Numbers generated by a Fibonacci-like sequence in which zeros are suppressed. A243063

a(n) = (15·n² + 9·n + 2)/2. A220083

a(0)=1, a(1)=1, a(n)=7·a(n/2) for n=2,4,6,..., a(n)=6·a((n-1)/2)+a((n+1)/2) for n=3,5,7,.... A116522

Number of T₀ antichains of nonempty subsets of {1..n}. A326950

Vertical of triangular spiral in A051682. A81271

Smallest number m such that A114228(m) = n. A114229

a(n) = 3·n² + 2·n - 1. A270710