Properties of the Number 64691

Sixty-Four Thousand Six Hundred Ninety-One

Basics

Value: 64690 → 64691 → 64692

Parity: odd

Prime: No

Previous Prime: 64679

Next Prime: 64693

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 11 × 5881

Divisors: 1, 11, 5881, 64691

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111110010110011

Octal: 176263

Duodecimal: 3152B

Hexadecimal: fcb3

Square: 4184925481

Square Root: 254.3442548987494

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

a(n) = ∑_i=0..n digsum₇(i)⁴, where digsum₇(i) = A053828(i). A231679

-a(n)/7! is the coefficient of x⁷ in the Taylor expansion of the k-th iteration of sin(x). A366827

Numbers n such that n = π(n)*k + 1 for some k. A65136

Numbers n such that there exists at least one number j and π(m) = d₁ d₂ ... d_j*d_j+1 d_j+2 ... d_k where d₁ d₂ ...d_k is the decimal expansion of n. A112012

Numbers k where k² is an anagram of (k+2)². A261749

Start with 1 and repeatedly reverse the digits and add 65 to get the next term. A118163

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), (0, 0, -1), (1, 0, 1), (1, 1, 1)}. A150948

a(n) is the smallest number not already used such that a(n)*a(n-1)*a(n-2) + 1 is a square, with a(1)=1 and a(2)=2. A64691