Properties of the Number 68639

Sixty-Eight Thousand Six Hundred Thirty-Nine

Basics

Value: 68638 → 68639 → 68640

Parity: odd

Prime: Yes

Previous Prime: 68633

Next Prime: 68659

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 68639

Divisors: 1, 68639

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000110000011111

Octal: 206037

Duodecimal: 3387B

Hexadecimal: 10c1f

Square: 4711312321

Square Root: 261.9904578415023

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 for which A049076 >= 4. A49090

Primes prime(k) for which A049076(k) = 4. A49080

Primes of the form 16·k-1 such that 4·k-1 and 8·k-1 are also primes. A101793

Primes of the form 16·k-1 such that 4·k-1, 8·k-1 and 32·k-1 are also primes. A101797

Prime numbers with prime indices in A333243. A333244

Number of non-equivalent ways to choose three points in an equilateral triangle grid of side n. A230723

Floor( e * (3/2)ⁿ ). A81225

Primes p which are floor of Root-mean-cube (RMC) of prime(n), prime(n+1) and prime(n+2). A239941

Numbers m such that Conv(b,m) = b has a unique nontrivial solution (b = 0 and b = 1 are considered trivial solutions). Here, Conv(b,m) denotes the limit of b^^t (mod m) as t goes to infinity. A347561

a(0) = 0, a(n) = a(n-1) + (-1)^p(n) for n >= 1, where p(n) = highest power of 2 dividing n. A68639