Properties of the Number 19889

Nineteen Thousand Eight Hundred Eighty-Nine

Basics

Value: 19888 → 19889 → 19890

Parity: odd

Prime: Yes

Previous Prime: 19867

Next Prime: 19891

Digit Sum: 35

Digital Root: 8

Palindrome: No

Factorization: 19889

Divisors: 1, 19889

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100110110110001

Octal: 46661

Duodecimal: B615

Hexadecimal: 4db1

Square: 395572321

Square Root: 141.0283659410404

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

Primes that remain prime through 3 iterations of the function f(x) = 2·x + 1. A23272

Numbers k such that (6^k - 1)/5 is prime. A4062

Primes starting a Cunningham chain of the first kind of length 4. A59763

Primes p such that the number of distinct prime divisors of all composite numbers between p and the next prime is 5. A75585

List of primes p1 such that (p1,p2) are twin primes where both 2·p1+p2 and p1+2·p2 are primes. A174920

Numbers n such that n, 2n+1, 3n+2, 4n+3 are primes. A67257

Primes having only {1, 8, 9} as digits. A385783

Values of A (the short leg) of a Pythagorean triangle with A and C (the hypotenuse) both prime and part of a twin prime. A51642

Primes with integer arithmetic mean of digits = 7 in base 10. A285227

Primes with digit sum = 35. A106770