Properties of the Number -3999

Nine Hundred Ninety-Nine

Basics

Value: -4000 → -3999 → -3998

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 31 × 43

Divisors: 1, 3, 31, 43, 93, 129, 1333, 3999

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -111110011111

Octal: -7637

Duodecimal: -2393

Hexadecimal: -f9f

Square: 15992001

Square Root: 63.23764701504951

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

First column in inverse of Euler φ sequence matrix. A106479

Consider the triangle in which the n-th row starts with n, contains n terms and the difference of successive terms is 1,2,3,... up to n-1. Sequence gives row sums. A81498

Smallest number whose sum of digits is n. A51885

Partial sums of A008137. A299276

Irregular triangle read by rows where T(n,k) is the number of integer compositions of n with k weak excedances (parts on or above the diagonal), all zeros removed. A352525

a(n) = (n-1)*(2·n+5). A130861

Numbers in which 9 outnumbers all other digits together. A292739

Numbers that are palindromic in bases 2 and 6. A182233

Lucas 8-step numbers. A105754

T(n,k)=Number of nXk 0..2 arrays with no more than floor(nXk/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order. A222573