Properties of the Number 7389

Seven Thousand Three Hundred Eighty-Nine

Basics

Value: 7388 → 7389 → 7390

Parity: odd

Prime: No

Previous Prime: 7369

Next Prime: 7393

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 821

Divisors: 1, 3, 9, 821, 2463, 7389

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1110011011101

Octal: 16335

Duodecimal: 4339

Hexadecimal: 1cdd

Square: 54597321

Square Root: 85.95929269136641

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(1) = 1; a(n) is smallest number >= a(n-1) such that the juxtaposition a(1)a(2)...a(n) is a prime. A33680

Triangle T(n,k), read by rows n>=0 with terms k=1..3ⁿ, where row n lists the coefficients in the n-th iteration of (x+x²+x³). A166880

Number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 633", based on the 5-celled von Neumann neighborhood. A273299

Expansion of ∏_k>=1 (1 + x^k * (1 + k·x)). A336980

Numbers k such that the continued fraction for sqrt(k) has period 100. A20439

Can express a(n) with the digits of a(n)² in order, only adding plus signs. A38206

Binary representation of base-(i-1) expansion of -n: replace i-1 with 2 in base-(i-1) expansion of -n. A256441

Irregular table read by rows: T(n,k) is the number of k-gons, k>=2, among all distinct circles that can be constructed from the 3 vertices and the equally spaced 3·n points placed on the sides of an equilateral triangle when every pair of the 3 + 3·n points are connected by a circle and where the points lie at the ends of the circle's diameter. A372734

Let z(n) be the golden ratio (φ) truncated to n decimal digits; sequence gives maximum element in the continued fraction for z(n). A81836

Triangle of coefficients of polynomials v(n,x) jointly generated with A210201; see the Formula section. A210202