Properties of the Number 2869

Two Thousand Eight Hundred Sixty-Nine

Basics

Value: 2868 → 2869 → 2870

Parity: odd

Prime: No

Previous Prime: 2861

Next Prime: 2879

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 19 × 151

Divisors: 1, 19, 151, 2869

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101100110101

Octal: 5465

Duodecimal: 17B1

Hexadecimal: b35

Square: 8231161

Square Root: 53.563046963368315

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

Centered icosahedral (or cuboctahedral) numbers, also crystal ball sequence for f.c.c. lattice. A5902

Coordination sequence for (2,4,7) tiling of hyperbolic plane. A265062

Number of strict integer partitions of n whose length (number of parts) can be written as a nonnegative linear combination of the parts. A367220

Square array A(n,k), n >= 0, k >= 0, read by antidiagonals: A(n,k) = [x^n²] theta₃(x)^k/(1 - x), where theta₃() is the Jacobi θ function. A302997

Number of "ON" cells at n-th stage in simple 2-dimensional cellular automaton (see Comments for precise definition). A160118

a(n) = (n+1)ⁿ⁺¹ - nⁿ for n>0, a(0) = 1. A7781

a(n) = n*(8·n-1). A139274

T(n,k)=Number of nXk 0..1 arrays with every element equal to 1, 2, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. A303102

Expansion of 1/(1-x*(1-6·x)). A145934

Numbers that are equal to the sum of the number of divisors of their k first powers, for some k. A270389