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Tuesday, December 22, 2009
1900
1900
= 2
2
x 5
2
x 19.
1900
has the representation
1900
= 2
3
3
5
- 44.
There are
1900
prime numbers less than or equal to 2
15
.
1900
is a 13-gonal (triskaeidecagonal or tridecagonal) number.
1900
is the sum of eight consecutive primes:
1900
=
223
+
227
+
229
+
233
+
239
+ 241 +
251
+ 257.
1900
is the largest palindrome in Roman numerals: MCM.
Source:
On-Line Encyclopedia of Integer Sequences
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