Properties of the Number -79808

Seventy-Nine Thousand Eight Hundred Eight

Basics

Value: -79809 → -79808 → -79807

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 2 ⁶ × 29 × 43

Divisors: 1, 2, 4, 8, 16, 29, 32, 43, 58, 64

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

9108 Try Today's Challenge

Representations

Binary: -10011011111000000

Octal: -233700

Duodecimal: -3A228

Hexadecimal: -137c0

Square: 6369316864

Square Root: 282.5030973281532

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

a(1) = 2; for n>1, a(n) = smallest integer > a(n-1) such that a(n) + a(i) + 1 is prime for all 1 <= i <= n-1. A93483

Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where T(n,k) = 2ⁿ * sqrt(Resultant(U_2·n(x/2), T_k(i·x/2))), where T_n(x) is a Chebyshev polynomial of the first kind, U_n(x) is a Chebyshev polynomial of the second kind and i = sqrt(-1). A334178

Square table where T(n,k) = binomial(n*(n+k), k) * n/(n+k), for n>=1, k>=0, as read by antidiagonals. A299427

Numerators of expansion of e.g.f. sinh(x) / sin(x) (even powers only). A965

Number of perfect matchings in graph C₇ X P_2n. A28478

a(n) = 2^2·n*n * ∏_1<=i,j<=n (cos(i*π/(2·n+1))² + sin(j*π/(2·n+1))²). A127606

Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where T(n,k) = ∏_a=1..n ∏_b=1..k (4·sin(a*π/(2·n+1))² + 4·cos(b*π/(2·k+1))²). A340476

Number of perfect matchings in the P₆ X C_n graph. A254611