Properties of the Number 90287

Ninety Thousand Two Hundred Eighty-Seven

Basics

Value: 90286 → 90287 → 90288

Parity: odd

Prime: No

Previous Prime: 90281

Next Prime: 90289

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 17 × 47 × 113

Divisors: 1, 17, 47, 113, 799, 1921, 5311, 90287

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10110000010101111

Octal: 260257

Duodecimal: 442BB

Hexadecimal: 160af

Square: 8151742369

Square Root: 300.47795260218345

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

Lucas-Carmichael numbers: squarefree composite numbers k such that p | k => p+1 | k+1. A6972

Lucas-Carmichael numbers with 3 prime factors. A216925

Composite numbers k that divide Fibonacci(k+1). A69107

Numbers k that divide Fibonacci(k+1) but do not divide Fibonacci(k) + 1. A94412

Least Lucas-Carmichael number divisible by the n-th prime. A253597

a(n) = least Lucas-Carmichael number which is divisible by b(n), where {b(n)} (A255602) is the list of all numbers which could be a divisor of a Lucas-Carmichael number. A253598

Numbers k such that the k-th triangular number contains each of the 10 decimal digits exactly once. A115939

Composite numbers k that divide both Fibonacci(k+1) and Fibonacci(2k+1)-1. A182504

Numbers k such that A370681(k) = A370681(k+1). A370682

Smallest prime obtained by sandwiching n between a number with identical digits, or 0 if no such prime exists. Primes of the form k n k where all the digits of k are identical. A90287