17871869

17871869 is an eight-digit numeral. As a pure number it equals 17,871,869. In most contexts, it is treated as a concatenation of two four-digit numbers: 1787 and 1869, rather than a single year. Because of this, it often appears in discussions about identifiers or data keys rather than in historical timelines by itself.

In historical contexts, the component years are notable. The year 1787 marks the drafting and signing of the United States Constitution, while 1869 is associated with the completion of the first transcontinental railroad. The juxtaposition of these years in a single string can be used in datasets to encode multiple milestones or to symbolize a link between two periods.

In data management and digital archives, such eight-digit strings are used as catalog numbers, file identifiers, or citation keys. Their meaning is usually defined by the system that generates them, not by universal arithmetic significance. Consequently, 17871869 has no ordinary calendrical meaning on its own, but may serve as a mnemonic or code within a larger metadata structure.

Related topics include 1787, 1869, concatenation and dataset identifiers.