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Properties of the Number -7389

Three Hundred Eighty-Nine

Basics

Value: -7390 → -7389 → -7388

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

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

Today's Target

5184 Try Today's Challenge

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

Triangle read by rows: Characteristic polynomials of lower triangular Bell number matrix. A101908
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 + xk * (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