Properties of the Number 3891

Three Thousand Eight Hundred Ninety-One

Basics

Value: 3890 → 3891 → 3892

Parity: odd

Prime: No

Previous Prime: 3889

Next Prime: 3907

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 1297

Divisors: 1, 3, 1297, 3891

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111100110011

Octal: 7463

Duodecimal: 2303

Hexadecimal: f33

Square: 15139881

Square Root: 62.37788069500277

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

Number of integer partitions of n with parts disjoint from first differences of parts, meaning no part is the difference of two consecutive parts. A363260

T(n,k) = number of n X k 0..2 arrays with new values 0..2 introduced in row major order and no element equal to any horizontal or vertical neighbor (colorings ignoring permutations of colors). A207997

Number of integer partitions of n with a unique prime part. A379304

Exponential convolution of Fibonacci numbers with themselves (divided by 2). A14335

Triangle read by rows in which row n lists n+1 terms, starting with n, such that the difference between successive terms is equal to n⁴ - 1. A162622

T(n,k)=Number of strings of n numbers x(i) in -k..k with sums of x(i) and of x(i)*x(i+1) both zero. A183944

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010011. A260767

Number of strict integer partitions of n with no adjacent parts of quotient 2. A350840

Numbers k such that k¹⁶ == 1 (mod 17³). A56088

T(n,k)=Number of nXk nonnegative integer arrays with upper left 0 and every value within 3 of its city block distance from the upper left and every value increasing by 0 or 1 with every step right or down. A252828