Properties of the Number 19919

Nineteen Thousand Nine Hundred Nineteen

Basics

Value: 19918 → 19919 → 19920

Parity: odd

Prime: Yes

Previous Prime: 19913

Next Prime: 19927

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 19919

Divisors: 1, 19919

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100110111001111

Octal: 46717

Duodecimal: B63B

Hexadecimal: 4dcf

Square: 396766561

Square Root: 141.13468744429912

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 having only {1, 2, 9} as digits. A385776

Primes having only {0, 1, 9} as digits. A199329

Absolute discriminants of complex quadratic fields with 3-class rank 2. A242862

Primes that contain digits 1 and 9 only. A20457

Primes having only {1, 4, 9} as digits. A260271

Primes having only {1, 6, 9} as digits. A363023

Primes having only {1, 5, 9} as digits. A385781

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

Primes of the form XYX, where Y is a single digit. A154270

Number of sphenic numbers, i.e., numbers with exactly three distinct prime factors, up to 10ⁿ. A215218