Properties of the Number 90817

Ninety Thousand Eight Hundred Seventeen

Basics

Value: 90816 → 90817 → 90818

Parity: odd

Prime: No

Previous Prime: 90803

Next Prime: 90821

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 197 × 461

Divisors: 1, 197, 461, 90817

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10110001011000001

Octal: 261301

Duodecimal: 44681

Hexadecimal: 162c1

Square: 8247727489

Square Root: 301.3585903869342

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

Number of length n+2 0..7 arrays with no three equal elements in a row and new values 0..7 introduced in 0..7 order. A242470

T(n,k)=Number of length n+2 0..k arrays with no three equal elements in a row and new values 0..k introduced in 0..k order. A242472

a(n) = sum of numbers formed using the digits of next n numbers. A81993

Numbers n such that n·2ⁿ + 1 is not prime. A173474

Reversal of σ(n) equals the sum of the reversals of the divisors of n. A203615

a(n)=numerator(B(2·prime(n))) where prime(n)=n-th prime and B(k) denotes the k-th Bernoulli number. A90817