Properties of the Number -78557

Seventy-Eight Thousand Five Hundred Fifty-Seven

Basics

Value: -78558 → -78557 → -78556

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 17 × 4621

Divisors: 1, 17, 4621, 78557

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -10011001011011101

Octal: -231335

Duodecimal: -39565

Hexadecimal: -132dd

Square: 6171202249

Square Root: 280.28021692584724

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

(Provable) Sierpiński numbers: odd numbers n such that for all k >= 1 the numbers n·2^k + 1 are composite. A76336

Conjectured smallest Sierpiński numbers of the second kind S, base b=2,3,4,5,..., where S·bⁿ+1 is composite for all n>=1 and gcd(S+1, b-1) = 1. A123159

Odd integers n such that for every integer k>0, n·2^k+1 has a divisor in the set { 3, 5, 7, 13, 19, 37, 73 }. A244562

Smallest Sierpinski number that is divisible by the n-th prime. A222534

Least k such that k·2^m + 1 has a covering set of modulus 2·n, or 0 if no such value exists. A257647

Odd k for which k+2^m is composite for all m < k. A33919

Least k such that k·2^m + 1 has a covering set with precisely n primes. A206001

Partial sums of A092183. A302559

a(1) = 78557 (the first Sierpinski number); thereafter a(n+1) = Od(3·5*7·13·19·37·73 - a(n)), where Od(m) is the odd part of m. A368560