Properties of the Number 79381

Seventy-Nine Thousand Three Hundred Eighty-One

Basics

Value: 79380 → 79381 → 79382

Parity: odd

Prime: No

Previous Prime: 79379

Next Prime: 79393

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 163 × 487

Divisors: 1, 163, 487, 79381

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011011000010101

Octal: 233025

Duodecimal: 39B31

Hexadecimal: 13615

Square: 6301343161

Square Root: 281.7463398165094

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

Strong pseudoprimes to base 5. A20231

Euler pseudoprimes to base 5: composite integers such that abs(5^{(n - 1}/2)) == 1 mod n. A262052

Strong pseudoprimes to base 7. A20233

Base-5 Euler-Jacobi pseudoprimes: odd composite k coprime to 5 such that 5^(k-1/2) == (5/k) (mod n), where (5/k) is the Jacobi symbol (or Kronecker symbol). A375914

Composite numbers k == 1, 9 (mod 10) such that 5^(k-1/2) == 1 (mod k). A375915

Euler pseudoprimes to base 7: composite integers such that abs(7^{(n - 1}/2)) == 1 mod n. A262054

Octagonal numbers (A000567) that are semiprimes (A001358). A259677

Overpseudoprimes to base 5. A141390

Strong pseudoprimes to base 12. A20238

Quotients k*(k+1)*(k+2) / (k+(k+1)+(k+2)) that are lucky numbers. A32792