Properties of the Number 37981

Thirty-Seven Thousand Nine Hundred Eighty-One

Basics

Value: 37980 → 37981 → 37982

Parity: odd

Prime: No

Previous Prime: 37967

Next Prime: 37987

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 19 × 1999

Divisors: 1, 19, 1999, 37981

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001010001011101

Octal: 112135

Duodecimal: 19B91

Hexadecimal: 945d

Square: 1442556361

Square Root: 194.88714683118536

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

The function W_n(6) (see Borwein et al. reference for definition). A169711

Expansion of ∏_{1 <= i < j} 1/(1 - x^i·j). A321285

a(n) = ∑_{k=0..floor(n/4)} 2^k * binomial(n-3·k,k)². A387508

Composite numbers whose prime factors contain no digits other than 1 and 9. A36309

Squarefree k > 1 with σ(σ(σ(k))) < 3·k + 1. A320513

a(n) = (2·n - 1)*(24·n² - 42·n + 19). A160174

Number of -n..n arrays of 4 elements with adjacent element differences also in -n..n. A201043

Number of n X 2 zero-sum -1..1 arrays with rows and columns lexicographically nondecreasing. A202027

Maximal base 5 run length is 2. A37981