Properties of the Number 19395

Nineteen Thousand Three Hundred Ninety-Five

Basics

Value: 19394 → 19395 → 19396

Parity: odd

Prime: No

Previous Prime: 19391

Next Prime: 19403

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 5 × 431

Divisors: 1, 3, 5, 9, 15, 45, 431, 1293, 2155, 3879

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100101111000011

Octal: 45703

Duodecimal: B283

Hexadecimal: 4bc3

Square: 376166025

Square Root: 139.26593266122194

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 compositions of n such that each part is adjacent to an equal part. A114901

Coefficients in the expansion of C²/B¹⁰, in Watson's notation of page 106. A160458

Relative of Hofstadter Q-sequence: a(n) = max(0, n+19395) for n <= 0; a(n) = a(n-a(n-1)) + a(n-a(n-2)) + a(n-a(n-3)) for n > 0. A283886

Number of integer partitions of n whose semi-sums do not cover an interval of positive integers. A367403

Numbers k such that (18^k - 1)² - 2 is prime. A364078

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 470", based on the 5-celled von Neumann neighborhood. A272421

Primes with primitive root 72. A19395

Number of (n+3)X5 binary arrays with no more than one of any consecutive four bits set in any row or column. A203042

A puzzle sequence, answer unknown. A112273