Properties of the Number -4391

Three Hundred Ninety-One

Basics

Value: -4392 → -4391 → -4390

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 4391

Divisors: 1, 4391

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1000100100111

Octal: -10447

Duodecimal: -265B

Hexadecimal: -1127

Square: 19280881

Square Root: 66.26462102811726

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) = -2·a(n-1) -2·a(n-2) + a(n-3). a(0) = -1, a(1) = 1, a(2) = 1. A233831

Values of n such that L(18) and N(18) are both prime, where L(k) = (n²+n+1)*2^2·k + (2·n+1)*2^k + 1, N(k) = (n²+n+1)*2^k + n. A227521

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 329", based on the 5-celled von Neumann neighborhood. A271276

Expansion of e.g.f. exp(sin(x)+sin(x)²). A189420

Primes whose base-5 representation also is the base-4 representation of a prime. A235615

Artiads: the primes p == 1 (mod 5) for which Fibonacci((p-1)/5) is divisible by p. A1583

Father primes of order 4. A136073

a(n) = (a(n-1)+a(n-2))/7^k, where 7^k is the highest power of 7 dividing a(n-1)+a(n-2). A78414

Primes p(n) for which (p(n-1) + p(n+2)) / p(n) = 2. A119381

Primes p for which exactly four bases b with 1 < b < p exist such that p is a base b Wieferich prime. A255207