Properties of the Number -1899

Eight Hundred Ninety-Nine

Basics

Value: -1900 → -1899 → -1898

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 211

Divisors: 1, 3, 9, 211, 633, 1899

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11101101011

Octal: -3553

Duodecimal: -1123

Hexadecimal: -76b

Square: 3606201

Square Root: 43.57751713900185

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

Expansion of (1-x-x^N)/((1-x)(1-x²)(1-x³)...(1-x^N)) for N = 9. A60028

Triangle read by rows, T(n,k) = (n!)³ * [x^k] [zⁿ] hypergeom([], [1, 1], z)^x for n>=0, 0<=k<=n. A287696

a(n) = exp(1) * ∑_k>=0 (-1)^k*(n·k + 1)ⁿ/k!. A307080

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 387", based on the 5-celled von Neumann neighborhood. A271546

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 469", based on the 5-celled von Neumann neighborhood. A272419

Flavius Josephus's sieve: Start with the natural numbers; at the k-th sieving step, remove every (k+1)-st term of the sequence remaining after the (k-1)-st sieving step; iterate. A960

Number of unimodal partitions/compositions of n into distinct terms. A72706

Iterate the map in A006368 starting at 8. A28393

Numbers k such that 2^k + 21 is prime. A57201

Number of integer partitions of n with no pair of consecutive parts relatively prime. A328187