Properties of the Number 9895

Nine Thousand Eight Hundred Ninety-Five

Basics

Value: 9894 → 9895 → 9896

Parity: odd

Prime: No

Previous Prime: 9887

Next Prime: 9901

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 5 × 1979

Divisors: 1, 5, 1979, 9895

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011010100111

Octal: 23247

Duodecimal: 5887

Hexadecimal: 26a7

Square: 97911025

Square Root: 99.47361459201129

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

Numerator of ∑_k=1..n 1/φ(k). A28415

Numbers k such that k² == 2 (mod 23²). A156849

a(n) = (prime(1+n)*prime(n)) + prime(n) + 1. A286624

Numbers that are the sum of ten fourth powers in exactly nine ways. A345861

Lucky numbers with size of gaps equal to 20 (lower terms). A31902

Numerators of a-sequence for Sheffer matrix A130191 (Stirling2 squared). A130408

Integers of the form 4n+3 for which ∑_i=1..u J(i,4n+3) obtains value zero exactly 7 times, when u ranges from 1 to (4n+3). Here J(i,k) is the Jacobi symbol. A166057

E.g.f.: exp( exp(3·x) - 2·exp(2·x) + 2·exp(x) - 1 ). A194006

Least number of consecutive primes beginning with 2, the sum of which (A007504) exceeds eⁿ. A323361

a(n) = ∑_k=1..n sigma₂(k) * floor(n/k). A356042