Properties of the Number -6399

Three Hundred Ninety-Nine

Basics

Value: -6400 → -6399 → -6398

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ⁴ × 79

Divisors: 1, 3, 9, 27, 79, 81, 237, 711, 2133, 6399

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1100011111111

Octal: -14377

Duodecimal: -3853

Hexadecimal: -18ff

Square: 40947201

Square Root: 79.9937497558403

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 symmetrical triangle sequence: T(n, k) = q^k + q^n-k - qⁿ, with q=3. A176225

a(n) = -(1/2)*(n+2)*(n² - 6·n - 1). A28494

Inverse Euler transform of {1,0,1,0,0,0,...}. A320786

a(n) = 4·n² - 1. A466

Generalized 19-gonal (or enneadecagonal) numbers: m*(17·m - 15)/2 with m = 0, +1, -1, +2, -2, +3, -3, ... A303813

Number of integer partitions of n such that the maximum is twice the median. A361849

3 times octagonal numbers: a(n) = 3·n*(3·n-2). A152751

T(n,k) = Number of n X k 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero. A284222

a(1) = 9; a(n) is smallest number >= a(n-1) such that the juxtaposition a(1)a(2)...a(n) is a prime. A46259

a(n) = 16n² + 32n + 15. A141759