899 = 29 x 31. It is the product of two successive primes and the product of twin primes.
Any number consisting of an 8 followed by an even number of nines has prime factors 3 x (10n/2) + 1 and 3 x (10n/2) - 1, where n is the number of nines: 899 = 3(101) + 1) x 3(101) - 1 = 31 x 29. Similarly, 8999999 = 2999 x 3001.
899 is the smallest number whose sum of digits is 26.
899 is a number that can't be expressed as the sum of a prime number and a Fibonacci number.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjDYd0anDIGI7Np1IMTFVAgJ8VLvH3wjbStFXqmNqtK-_NbRAnh8uzP5QCeORrv5691wxWtR7fBTWubc8wjiYJ84V-H51KbnXj22gtLX7yJ4dRXmpTMDnq7REB-_bitBmZ2gBbyUgUxARw/s200/n0899.jpg)
Source: Prime Curios!
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