Properties of the Number 64690

Sixty-Four Thousand Six Hundred Ninety

Basics

Value: 64689 → 64690 → 64691

Parity: even

Prime: No

Previous Prime: 64679

Next Prime: 64693

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 × 5 × 6469

Divisors: 1, 2, 5, 10, 6469, 12938, 32345, 64690

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111110010110010

Octal: 176262

Duodecimal: 3152A

Hexadecimal: fcb2

Square: 4184796100

Square Root: 254.34228905158497

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

Numbers k such that π(k) divides k. A57809

Numbers n divisible by π(n) [A057809] with prime π(n); i.e., largest prime factor of n equals π(n). A71394

Numbers k such that k and k+1 are both binary Moran numbers (A334344). A334345

Consider the sequence {b(m)} of nonprimes; sequence gives values of m where gcd{m, b(m)} increases. A58011

Numbers n such that π(n) = (1/10)*n. A165689

Define a sequence of fractions by x(m+1) = (x(m)²+x(m)-1)/(x(m)+1) with x(0)=1; sequence gives values of k such that sgn(x(k))<>sgn(x(k-1)). A64690