Properties of the Number 83921

Eighty-Three Thousand Nine Hundred Twenty-One

Basics

Value: 83920 → 83921 → 83922

Parity: odd

Prime: Yes

Previous Prime: 83911

Next Prime: 83933

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 83921

Divisors: 1, 83921

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100011111010001

Octal: 243721

Duodecimal: 40695

Hexadecimal: 147d1

Square: 7042734241

Square Root: 289.691214916849

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) is the smallest prime p such that there is a multiplicative subgroup H of Z/pZ, of odd order and of index 2n, such that for any two cosets H1 and H2 of H, H1 + H2 contains all of (Z/pZ)\0, except that H+H contains all of (Z/pZ)\0 except -H. If no such prime exists, a(n) = 0. A294615

Prime(k), where k divides ∑_i=1..k prime(i)¹⁵. A232848

Number of permutations in S_2·n+3 containing the pattern 2143...(2n)(2n-1). A271648

Numbers k such that (85·10^k - 1)/3 is prime. A289942

Start with (1,2) and then concatenate 2ⁿ+1 previous terms, n>=0 and add 2 if a(2ⁿ+1)=1 or add 1 if a(2ⁿ+1)=2. A83921