Properties of the Number 43391

Forty-Three Thousand Three Hundred Ninety-One

Basics

Value: 43390 → 43391 → 43392

Parity: odd

Prime: Yes

Previous Prime: 43331

Next Prime: 43397

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 43391

Divisors: 1, 43391

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1010100101111111

Octal: 124577

Duodecimal: 2113B

Hexadecimal: a97f

Square: 1882778881

Square Root: 208.3050647487958

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

Numerator of -3·n + 2*(1+n)*HarmonicNumber(n). A93418

Least k such that prime(k) >= 2ⁿ. A372684

a(0)=1, a(1)=1, a(n) = largest prime <= a(n-1) + a(n-2). A55500

Initial term in sequence of four consecutive primes separated by 3 consecutive differences each <=6 (i.e., when d = 2, 4 or 6) and forming d-pattern=[6,2,4]; short d-string notation of pattern = [624]. A78853

Smallest prime p such that there is a gap of 2n between p and previous prime. A1632

Numbers whose least quadratic nonresidue (A020649) is 17. A25026

Prime number spiral (clockwise, North spoke). A54551

a(n) is the smallest prime q such that (q-p)/(r-q) = n, where p<q<r are consecutive primes (or 0 if none exist). A179256

a(0)=1, a(1)=2, a(n) = largest prime < a(n-1)+a(n-2). A55501

Primes that show the slow decrease in the larger values of the Andrica function Af(k) = sqrt(p(k+1)) - sqrt(p(k)), where p(k) denotes the k-th prime. A84975