Properties of the Number 78649

Seventy-Eight Thousand Six Hundred Forty-Nine

Basics

Value: 78648 → 78649 → 78650

Parity: odd

Prime: Yes

Previous Prime: 78643

Next Prime: 78653

Digit Sum: 34

Digital Root: 7

Palindrome: No

Factorization: 78649

Divisors: 1, 78649

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011001100111001

Octal: 231471

Duodecimal: 39621

Hexadecimal: 13339

Square: 6185665201

Square Root: 280.4442903679802

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

Denominators of continued fraction convergents to sqrt(142). A41261

G.f. A(x) satisfies: 1 = ∑_n>=0 ( (1 + x·A(x)³)ⁿ - A(x) )ⁿ. A303928

Primes of the form 7n² - 3. A201849

Primes p where q = p + 4 is also prime and rad((p+1)(p+2)(p+3)) < pq, where rad(k) is the largest squarefree number dividing k. A268350

Numbers n such that A000002(n)=A000002(n+1) where A000002 is the Kolakoski sequence. A78649

Emirps p such that p+(sum of digits of p) and reverse(p)+(sum of digits of p) are emirps. A340843