Properties of the Number 16639

Sixteen Thousand Six Hundred Thirty-Nine

Basics

Value: 16638 → 16639 → 16640

Parity: odd

Prime: No

Previous Prime: 16633

Next Prime: 16649

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 7 × 2377

Divisors: 1, 7, 2377, 16639

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100000011111111

Octal: 40377

Duodecimal: 9767

Hexadecimal: 40ff

Square: 276856321

Square Root: 128.99224782908468

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 sequence of asymptotic density ζ(9) - 1, where ζ is the Riemann ζ function. A143035

a(n) = (2ⁿ + 1)² - 2. A93069

Positions of the elements of the quasicyclic group Z+(2a+1)/(2^b) [a > 0 and a < 2^b-1, b > 0] at the ]0,1[ side of the Stern-Brocot Tree (A007305/A007306). A65674

Number of sum of squares representations of n² in n dimensions disregarding order and sign. A105152

Numbers k such that A163511(k) is a seventh power. A366287

Denominators of continued fraction convergents to sqrt(609). A42169

Number of nonempty subsets of {1, 1/2, 1/3, ..., 1/n} that sum to an integer. A111233

Smallest m such that A116361(m) = n. A116362

Number of 2 X 2 matrices with all elements in {0,1,...,n} and determinant >= 3n. A210368

Maximal size of a Binary Decision Diagram (or BDD) of index n. A327461