Properties of the Number 68891

Sixty-Eight Thousand Eight Hundred Ninety-One

Basics

Value: 68890 → 68891 → 68892

Parity: odd

Prime: Yes

Previous Prime: 68881

Next Prime: 68897

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 68891

Divisors: 1, 68891

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000110100011011

Octal: 206433

Duodecimal: 33A4B

Hexadecimal: 10d1b

Square: 4745969881

Square Root: 262.47095077360467

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

Initial term in sequence of four consecutive primes separated by 3 consecutive differences each <=6 (i.e., when d = 2, 4 or 6) and forming d-pattern=[6,2,4]; short d-string notation of pattern = [624]. A78853

Primes whose trajectories under the map x -> A039951(x) enter the cycle {83, 4871} (conjectured). A252812

a(n) = (7·3ⁿ + 1)/2. A199109

a(n) = n·3^n-1 + (3ⁿ + 1)/2. A86972

Primes p such that the differences between the 5 consecutive primes starting with p are (6,2,4,6). A78958

Rectangular array A read by upward antidiagonals in which the entry in row n and column k is defined by A(n,k) = 5 + 9·A005836(2^{k - 1}*(2 n - 1)), n,k >= 1. A265159

a(n) is the smallest natural number we cannot obtain from n, n+1, n+2, n+3, n+4, n+5, n+6, n+7 and the operators +, -, *, /, using each number only once. A143192

Primes p such that p-+1, p-+3, p-+5 are not squarefree. A155145

Primes of the form 10n² + 1. A201709

Records in the numbers of representations of k² as x² - x·y + y², x > 2·y >= 0, corresponding to the numbers of grid points with squared radius A357302(n)² in an angular sector 0 <= φ < π/6 of the triangular lattice. A357303