Properties of the Number -102087

One Hundred Two Thousand Eighty-Seven

Basics

Value: -102088 → -102087 → -102086

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 19 × 199

Divisors: 1, 3, 9, 19, 27, 57, 171, 199, 513, 597

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11000111011000111

Octal: -307307

Duodecimal: -4B0B3

Hexadecimal: -18ec7

Square: 10421755569

Square Root: 319.51056320566306

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

Gaps of 8 in sequence A038593 (lower terms). A38655

a(1)=1; a(n) = ∑_{1<=k<n, gcd(k,n(n+1)/2)=1} a(k). A125597

a(n) = T(n, 4) with T(n, k) = ∑_d∣k φ(d)*binomial(n - 1 + k/d, k/d). A327032