Properties of the Number 919

Nine Hundred Nineteen

Basics

Value: 918 → 919 → 920

Parity: odd

Prime: Yes

Previous Prime: 911

Next Prime: 929

Digit Sum: 19

Digital Root: 1

Palindrome: Yes

Factorization: 919

Divisors: 1, 919

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1110010111

Octal: 1627

Duodecimal: 647

Hexadecimal: 397

Square: 844561

Square Root: 30.315012782448235

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: Yes

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Palindromic primes: prime numbers whose decimal expansion is a palindrome. A2385

Hex (or centered hexagonal) numbers: 3·n*(n+1)+1 (crystal ball sequence for hexagonal lattice). A3215

Prime-indexed primes: primes with prime subscripts. A6450

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

Primes whose reversal in base 10 is also prime (called "palindromic primes" by David Wells, although that name usually refers to A002385). Also called reversible primes. A7500

Primes of the form 8n+7, that is, primes congruent to -1 mod 8. A7522

Primes of form 10·k + 9. A30433

Primes p such that the decimal expansion of its base-9 conversion is also prime. A65727

Primes such that their decimal representations interpreted in base 11 are also prime. A91924

Number of partitions of n into parts having a common factor. A18783