Properties of the Number 64891

Sixty-Four Thousand Eight Hundred Ninety-One

Basics

Value: 64890 → 64891 → 64892

Parity: odd

Prime: Yes

Previous Prime: 64879

Next Prime: 64901

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 64891

Divisors: 1, 64891

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1111110101111011

Octal: 176573

Duodecimal: 31677

Hexadecimal: fd7b

Square: 4210841881

Square Root: 254.7371193995881

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

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00001001. A259962

Prime numbers p of the form 10k+1 for which the pentanacci quintic polynomial x⁵-x⁴-x³-x²-x-1 modulus p is factorizable into five binomials. A135843

Balanced primes of order thirteen. A300364

Triangle of coefficients of powers of e² in numerators of ∑_k>=1 {1 / (1 + k²*π²)ⁿ}. A85470

Prime numbers p such that p +- ((p-1)/7) are primes. A137770

In this sequence each prime ends a prime century. Place a 0 between the final two digits, and raise the 100s digit by 1, to form the first prime of the next century. A156083

Primes of the form 6·k² - 5. A201791

The smallest of four consecutive primes with prime gaps {a,b,c} = {10,18,2}. A215719

Number of (n+2) X (3+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00000000 00000001 or 00001001. A259957

Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00001001. A259960