1089 (number) - meaning and definition. What is 1089 (number)
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What (who) is 1089 (number) - definition

NATURAL NUMBER
1089 trick; Magic number 1089; 1,089; 1 089

1089 (number)         
1089 is the integer after 1088 and before 1090. It is a square number (33 squared), a nonagonal number, a 32-gonal number, a 364-gonal number, and a centered octagonal number.
1089         
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YEAR
1089 (year); Year 1089; AD 1089; 1089 CE; 1089 AD; Events in 1089; Births in 1089; Deaths in 1089
Year 1089 (MLXXXIX) was a common year starting on Monday (link will display the full calendar) of the Julian calendar.
Self number         
A NATURAL NUMBER THAT CANNOT BE WRITTEN AS THE SUM OF ANY OTHER NATURAL NUMBER N AND THE INDIVIDUAL DIGITS OF N
Colombian number; Columbian number; Self-number; Self prime; Devlali number
In number theory, a self number or Devlali number in a given number base b is a natural number that cannot be written as the sum of any other natural number n and the individual digits of n. 20 is a self number (in base 10), because no such combination can be found (all n < 15 give a result less than 20; all other n give a result greater than 20).

Wikipedia

1089 (number)

1089 is the integer after 1088 and before 1090. It is a square number (33 squared), a nonagonal number, a 32-gonal number, a 364-gonal number, and a centered octagonal number. 1089 is the first reverse-divisible number. The next is 2178 (= 1089 × 2 = 8712/4), and they are the only four-digit numbers that divide their reverse.