Properties of the Number 83621

Eighty-Three Thousand Six Hundred Twenty-One

Basics

Value: 83620 → 83621 → 83622

Parity: odd

Prime: Yes

Previous Prime: 83617

Next Prime: 83639

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 83621

Divisors: 1, 83621

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10100011010100101

Octal: 243245

Duodecimal: 40485

Hexadecimal: 146a5

Square: 6992471641

Square Root: 289.1729586251107

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

Primes of the form 2n²+14n+5. A154577

Primes for which only three iterations of 'Prime plus its digit sum equals a prime' are possible. A48525

Fibonacci with priority for primes: a(0)=0, a(1)=1, for n >= 2, a(n) = a(n-1) + a(k), where 0 < k <= n-2 is maximal index such that a(n-1) + a(k) is prime. If there is no such k, then a(n) = a(n-1) + a(n-2). A216231

SanD-68 primes p: such that p+d is also prime and sum of digits A007953(p(p+d)) = d, with d = 68. A307474

Primes that remain prime through 4 iterations of function f(x) = 10x + 9. A23329

Primes which yield again a prime when the digits are taken according to the lexicographically first superpermutation of corresponding order and of minimal length. A332088

Starting positions of strings of four 5's in the decimal expansion of π. A83621