Properties of the Number 30689

Thirty Thousand Six Hundred Eighty-Nine

Basics

Value: 30688 → 30689 → 30690

Parity: odd

Prime: Yes

Previous Prime: 30677

Next Prime: 30697

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 30689

Divisors: 1, 30689

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111011111100001

Octal: 73741

Duodecimal: 15915

Hexadecimal: 77e1

Square: 941814721

Square Root: 175.18276170902203

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 (3^k + 7^k)/10 is prime. A128067

Number of regions formed when n points are placed in general position on each edge of a square and a chord is drawn from each point to the 3·n points on the other three sides. A392172

Primes that remain prime through 3 iterations of function f(x) = 8x + 7. A23294

Array read by antidiagonals: Place k points in general position on each side of a regular n-gon and join every pair of the k·n boundary points by a chord; T(n,k) (n >= 3, k >= 0) gives the number of regions in the resulting planar graph. A392228

Primes whose base-6 representation is a square when read in base 10. A267820

Numbers k such that 6!*(2·k-7)!/(k!*(k-1)!) is an integer. A4786

Integer part of log(nⁿ)^{1 + log(log(1 + n})). A62479

Primes p=u²+v² such that p+u or p+v is the next prime after p. A213996

Euclid-Mullin sequence (A000945) with initial value a(1) = 139 instead of a(1) = 2. A261703

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 793", based on the 5-celled von Neumann neighborhood. A273566