Properties of the Number 84680

Eighty-Four Thousand Six Hundred Eighty

Basics

Value: 84679 → 84680 → 84681

Parity: even

Prime: No

Previous Prime: 84673

Next Prime: 84691

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 ³ × 5 × 29 × 73

Divisors: 1, 2, 4, 5, 8, 10, 20, 29, 40, 58

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100101011001000

Octal: 245310

Duodecimal: 41008

Hexadecimal: 14ac8

Square: 7170702400

Square Root: 290.99828178186897

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

Chebyshev polynomials S(n,291). A98248

a(n) = 4*(3·n+1)*(3·n+2). A144410

Both k and its reverse are one less than a square. A287389

a(n) = A305312(n)/4 if A305312(n)is even and a(n) = (A305312(n) - 1)/4 if A305312(n) is odd, for n >= 1. A308687

Number of (n+2) X (4+2) 0..3 arrays with every consecutive three elements in every row and column having exactly two distinct values, and in every diagonal and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order. A252691

a(n) = n⁴ + 4·n² + 3. A304726

a(n) is the numerator of the square of the n-th Lagrange number. A382098

Values of n² - 1 resulting from A050795. A50799

Order of 10 modulo n [i.e., least m such that 10^m = 1 (mod n)] or 0 when no such number exists. A84680

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every consecutive three elements in every row and column having exactly two distinct values, and in every diagonal and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order. A252695