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Properties of the Number 27681

Twenty-Seven Thousand Six Hundred Eighty-One

Basics

Value: 27680 → 27681 → 27682

Parity: odd

Prime: No

Previous Prime: 27673

Next Prime: 27689

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 9227

Divisors: 1, 3, 9227, 27681

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 110110000100001

Octal: 66041

Duodecimal: 14029

Hexadecimal: 6c21

Square: 766237761

Square Root: 166.37608001152088

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

Integers k such that 10k - 23 is a prime number. A108328
Reversion of rooted trees A000081. A50395
Semiprimes k such that k is congruent to 5 modulo k's index in the sequence of semiprimes. A357023
Decimal part of a(n)1/6 starts with reversal of its integer part: first term of runs. A34312
Number of walks within N3 (the first octant of Z3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 1), (-1, 1, -1), (0, 1, -1), (1, 0, 0)}. A148142
Numbers whose Collatz trajectories cross their initial values a record number of times. A319738
One-half the number of permutations of length n with exactly 3 rising or falling successions. A1267
Number of permutations of length n with exactly 3 rising or falling successions. A86854
Number of (n+2)X(1+2) 0..2 arrays with every consecutive three elements in every row having 2 or 3 distinct values, in every column 1 or 2 distinct values, in every diagonal 2 distinct values, and in every antidiagonal 2 distinct values, and new values 0 upwards introduced in row major order. A252877
Number of independent subsets of Hamming graph H(n,3). A27681