Properties of the Number 68879

Sixty-Eight Thousand Eight Hundred Seventy-Nine

Basics

Value: 68878 → 68879 → 68880

Parity: odd

Prime: Yes

Previous Prime: 68863

Next Prime: 68881

Digit Sum: 38

Digital Root: 2

Palindrome: No

Factorization: 68879

Divisors: 1, 68879

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10000110100001111

Octal: 206417

Duodecimal: 33A3B

Hexadecimal: 10d0f

Square: 4744316641

Square Root: 262.44809010545305

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 k³ - k - 1. A116581

a(n) = n³ - n - 1. A126420

Primes of the form 42·k³ + 270·k² - 26436·k + 250703 in order of increasing k. A271144

List of primes p1 such that (p1,p2) are twin primes where both 2·p1+p2 and p1+2·p2 are primes. A174920

Primes with digit sum = 38. A106772

Numerator of h(n+5) - h(n) where h(n) = ∑_k=1..n (1/k) are the Harmonic numbers. A189998

a(n) = smallest prime of the form n*(n+1)*(n+2)...(n+k-1) - 1, or zero if no such a prime exists. A172125

Primes of the form (k - 1) * k * (k + 1) +- 1, k >= 1. A293861

Number of 4Xn 0..1 arrays avoiding 0 0 0 horizontally and 0 1 1 vertically. A206937

Duplicate of A030152. A68879