Properties of the Number 68447

Sixty-Eight Thousand Four Hundred Forty-Seven

Basics

Value: 68446 → 68447 → 68448

Parity: odd

Prime: Yes

Previous Prime: 68443

Next Prime: 68449

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 68447

Divisors: 1, 68447

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000101101011111

Octal: 205537

Duodecimal: 3373B

Hexadecimal: 10b5f

Square: 4684991809

Square Root: 261.6237756779762

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

Primes p such that, if q,r,s are the next three primes, both p·q*r·s - (p+q+r+s) and p·q*r·s + (p+q+r+s) are primes. A390929

Primes that remain prime through 4 iterations of function f(x) = 9x + 4. A23325

Denominators of continued fraction convergents to sqrt(706). A42359

Primes that remain prime through 5 iterations of the function f(x) = 9x + 4. A23353

Primes of the form 5·k² + 2, k >= 0. A201481

Primes that are arithmetical average of 100 consecutive primes. A217985

Array read by antidiagonals: T(n,k) (n>=1, k>=1) = number of ways to select four points from an n X k grid so that they form a convex quadrilateral. A334711

Factorial expansion: ζ(4) = π⁴/90 = ∑_n>0 a(n)/n!. A68447

Numbers k such that k remains prime after five iteration of function f(j) = 14·f(j)+1, starting at f(1) = prime. A86127