Properties of the Number 19389

Nineteen Thousand Three Hundred Eighty-Nine

Basics

Value: 19388 → 19389 → 19390

Parity: odd

Prime: No

Previous Prime: 19387

Next Prime: 19391

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 23 × 281

Divisors: 1, 3, 23, 69, 281, 843, 6463, 19389

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100101110111101

Octal: 45675

Duodecimal: B279

Hexadecimal: 4bbd

Square: 375933321

Square Root: 139.24438947404667

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

Numbers of the form 68+p² (where p is a prime). A138691

Coefficients of the eigenfunction of a sequence transformation. A88674

Sum of next n odd interprimes. A75674

G.f. A(x) satisfies: 3·A(x) - 2*(1+x) = Series_Reversion( x/(2·A(x) - (1+x)) )/x. A249933

Composite numbers k such that k*φ(k) is in A002378. A256545

MM-numbers of capturing, non-nesting multiset partitions (with empty parts allowed). A326260

On a spirally numbered square grid, with labels starting at 1, this is the number of the last cell that an (n,n+1) leaper reaches before getting trapped, or -1 if it never gets trapped. A343179

a(n) = round(n*φ¹⁴), where φ is the golden ratio, A001622. A4949

Expansion of ∏_k>=1 (1 + x^k)^3·k*(k-1/2+1). A295180

Number of permutations of 1..n+6 with the number moved left exceeding the number moved right by n or more. A179581