Properties of the Number 1899

One Thousand Eight Hundred Ninety-Nine

Basics

Value: 1898 → 1899 → 1900

Parity: odd

Prime: No

Previous Prime: 1889

Next Prime: 1901

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

Today's Target

2730 Try Today's Challenge

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

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

Numbers where 9 outnumbers any other digit. A292449

Rectangular table, read by antidiagonals, such that the g.f. of row n, R_n(y), satisfies: R_n(y) = [ ∑_k>=0 y^k * R_n·k(y) ]ⁿ for n>=0, with R₀(y)=1. A124550

a(n) = 90·n - 81. A139280

Trajectory of 13 under map n->A006368(n). A180864

Numbers k such that k and k+1 are both base φ Niven numbers (A334308). A334309