139 (number)

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138 139 140
Cardinal one hundred thirty-nine
Ordinal 139th
(one hundred thirty-ninth)
Factorization prime
Prime 34th
Divisors 1, 139
Greek numeral ΡΛΘ´
Roman numeral CXXXIX
Binary 100010112
Ternary 120113
Senary 3516
Octal 2138
Duodecimal B712
Hexadecimal 8B16

139 (one hundred [and] thirty-nine) is the natural number following 138 and preceding 140.

Contents

In mathematics

139 is the 34th prime number. It is a twin prime with 137. Because 141 is a semiprime, 139 is a Chen prime. 139 is the smallest prime before a prime gap of length 10. [1]

This number is the sum of five consecutive prime numbers (19 + 23 + 29 + 31 + 37).

It is the smallest factor of 64079 which is the smallest Lucas number with prime index which is not prime. It is also the smallest factor of the first nine terms of the Euclid–Mullin sequence, making it the tenth term.

139 is a happy number [2] and a strictly non-palindromic number. [3]

In the military

In transportation

In other fields

139 is also:

See also

Related Research Articles

127 is the natural number following 126 and preceding 128. It is also a prime number.

137 is the natural number following 136 and preceding 138.

10,000 is the natural number following 9,999 and preceding 10,001.

145 is the natural number following 144 and preceding 146.

129 is the natural number following 128 and preceding 130.

131 is the natural number following 130 and preceding 132.

133 is the natural number following 132 and preceding 134.

167 is the natural number following 166 and preceding 168.

152 is the natural number following 151 and preceding 153.

136 is the natural number following 135 and preceding 137.

173 is the natural number following 172 and preceding 174.

141 is the natural number following 140 and preceding 142.

154 is the natural number following 153 and preceding 155.

156 is the natural number, following 155 and preceding 157.

159 is a natural number following 158 and preceding 160.

165 is the natural number following 164 and preceding 166.

161 is the natural number following 160 and preceding 162.

166 is the natural number following 165 and preceding 167.

176 is the natural number following 175 and preceding 177.

182 is the natural number following 181 and preceding 183.

References

  1. Wells, D. The Penguin Dictionary of Curious and Interesting Numbers London: Penguin Group. (1987): 139
  2. "Sloane's A007770 : Happy numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-27.
  3. "Sloane's A016038 : Strictly non-palindromic numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-27.