199 (number)

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← 198 199 200 →
Cardinalone hundred ninety-nine
Ordinal199th
(one hundred ninety-ninth)
Factorizationprime
Prime46th
Greek numeralΡϞΘ´
Roman numeralCXCIX
Binary110001112
Ternary211013
Octal3078
Duodecimal14712
HexadecimalC716

199 (one hundred [and] ninety-nine) is the natural number following 198 and preceding 200.

In mathematics[edit]

  • 199 is the smallest positive integer d such that the imaginary quadratic field Q(d) has class number = 9.[1]
  • 199 is first prime number in a sequence of 10 consecutive prime numbers with common difference 210 (Tao and Green 2008; see R.Taschner "Die Farben der Quadratzahlen" p. 147) for k=10 the ten primes are 199+j*210; j=0 to 9; 199;199+210=409;409+210=619...1879+210=2089.

In geography[edit]

In movies[edit]

In transportation[edit]

In TV and radio[edit]

In other fields[edit]

199 is also:

See also[edit]

References[edit]

  1. ^ "Tables of imaginary quadratic fields with small class number". numbertheory.org.

External links[edit]