It is a happy number.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 988649789 = 67 ⋅14755967.
It is a cyclic number.
It is a Duffinian number.
Almost surely, 2987946889 is an apocalyptic number.
It is an amenable number.
987946889 is a wasteful number, since it uses less digits than its factorization.
987946889 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 687990.
The square root of 987946889 is about 31431.6224366481. The cubic root of 987946889 is about 995.9660454251.
The spelling of 987946889 in words is "nine hundred eighty-seven million, nine hundred forty-six thousand, eight hundred eighty-nine".