Properties of the Number 86669

Eighty-Six Thousand Six Hundred Sixty-Nine

Basics

Value: 86668 → 86669 → 86670

Parity: odd

Prime: No

Previous Prime: 86629

Next Prime: 86677

Digit Sum: 35

Digital Root: 8

Palindrome: No

Factorization: 11 × 7879

Divisors: 1, 11, 7879, 86669

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101001010001101

Octal: 251215

Duodecimal: 421A5

Hexadecimal: 1528d

Square: 7511515561

Square Root: 294.3959918205409

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) = floor(n*φ¹⁸), where φ is the golden ratio, A001622. A4933

T(n,k)=number of nXk binary matrices with rows in lexicographically nondecreasing order and columns in strictly increasing order. A180988

a(n) = number of divisors of n that are fundamental discriminants. A86669

Indices of primes in sequence defined by A(0) = 89, A(n) = 10·A(n-1) - 21 for n > 0. A101075

Numbers k such that 8·10^k + 6·R_k + 3 is prime, where R_k = 11...1 is the repunit (A002275) of length k. A103088