Properties of the Number 1839

One Thousand Eight Hundred Thirty-Nine

Basics

Value: 1838 → 1839 → 1840

Parity: odd

Prime: No

Previous Prime: 1831

Next Prime: 1847

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 613

Divisors: 1, 3, 613, 1839

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

603 Try Today's Challenge

Representations

Binary: 11100101111

Octal: 3457

Duodecimal: 1093

Hexadecimal: 72f

Square: 3381921

Square Root: 42.883563284783136

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

Composite and every divisor (except 1) contains the digit 3. A62668

Values of n such that n²-2 and n²+2 are both prime. A108701

a(1) = 2; a(n) is smallest number >= a(n-1) such that the juxtaposition a(1)a(2)...a(n) is a prime. A33679

Numbers n such that the decimal expansions of both n and n² have 1 as smallest digit and 9 as largest digit. A256601

Analog of A121805, but starting with 4. A366492

Number of connected components of n faces of the snub cube up to the 24 rotations of the snub cube. A384072

a(0)=1. a(n) = a(n-1)*2, if n is in the sequence. a(n) = a(n-1) + 1 if n is missing from the sequence. A118551

Indices where A248218(n) = 1. A248219

Number of rooted unlabeled trees on n nodes where each node has at most 8 children. A292553

Numbers k such that k² * 2^k - 1 is prime. A58781