Properties of the Number 68890

Sixty-Eight Thousand Eight Hundred Ninety

Basics

Value: 68889 → 68890 → 68891

Parity: even

Prime: No

Previous Prime: 68881

Next Prime: 68891

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 2 × 5 × 83 ²

Divisors: 1, 2, 5, 10, 83, 166, 415, 830, 6889, 13778

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000110100011010

Octal: 206432

Duodecimal: 33A4A

Hexadecimal: 10d1a

Square: 4745832100

Square Root: 262.4690457939755

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) = 3ⁿ⁺¹ + (3ⁿ-1)/2. A237930

Number of ways associated with A088959. A88111

Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-1) + b(n-2) + n + 1, where a(0) = 1, a(1) = 2, b(0) = 3, and (a(n)) and (b(n)) are increasing complementary sequences. A294556

a(n) = n+1 for n <= 2; otherwise a(n) = 3·a(n-3)+1. A329774

Numbers k such that k + sum_of_digits(k) is a cube. A84661

Number of n X n binary arrays with rows lexicographically nondecreasing and columns lexicographically nondecreasing and row sums nondecreasing and column sums nonincreasing. A266929

Number of nX7 binary arrays with rows lexicographically nondecreasing and columns lexicographically nondecreasing and row sums nondecreasing and column sums nonincreasing. A266934

Number of 7Xn binary arrays with rows lexicographically nondecreasing and columns lexicographically nondecreasing and row sums nondecreasing and column sums nonincreasing. A266940

T(n,k)=Number of nXk binary arrays with rows lexicographically nondecreasing and columns lexicographically nondecreasing and row sums nondecreasing and column sums nonincreasing. A266935

Smallest prime that is the sum of a square and a positive cube in n different ways. A173795