Properties of the Number 99861

Ninety-Nine Thousand Eight Hundred Sixty-One

Basics

Value: 99860 → 99861 → 99862

Parity: odd

Prime: No

Previous Prime: 99859

Next Prime: 99871

Digit Sum: 33

Digital Root: 6

Palindrome: No

Factorization: 3 × 33287

Divisors: 1, 3, 33287, 99861

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11000011000010101

Octal: 303025

Duodecimal: 49959

Hexadecimal: 18615

Square: 9972219321

Square Root: 316.0079112933725

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(n) = coefficient of xⁿ in A(x) such that: A(x)² = A( x²/(1 - 4·x - 4·x²) ). A357547

Number of connected (0,1)-matrices with n ones and no zero rows or columns. A321584

a(n) = number of subsets S of {1,2,...,n} having more than 2 elements such that (sum of least two elements of S) = difference between greatest two elements of S. A357292

q-Expansion of wedge character χ³(q). A288579

a(n) = (2·n-1)-st composite number: a bisection of A002808. A99861

a(n) = coefficient of xⁿ, n >= 1, in A(x) such that: A(x)² = A( x²/(1 - 4·x - 4·x²) ) * sqrt(1 - 4·x - 4·x²). A357785