989864663 has 16 divisors (see below), whose sum is σ = 1028280000. Its totient is φ = 952134912.

The previous prime is 989864647. The next prime is 989864669. The reversal of 989864663 is 366468989.

It is not a de Polignac number, because 989864663 - 2⁴ = 989864647 is a prime.

It is a super-2 number, since 2×989864663² = 1959664102112207138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989864669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2254598 + ... + 2255036.

It is an arithmetic number, because the mean of its divisors is an integer number (64267500).

Almost surely, 2^989864663 is an apocalyptic number.

989864663 is a deficient number, since it is larger than the sum of its proper divisors (38415337).

989864663 is a wasteful number, since it uses less digits than its factorization.

989864663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034.

The product of its digits is 13436928, while the sum is 59.

The square root of 989864663 is about 31462.1147254917. The cubic root of 989864663 is about 996.6100757320.

The spelling of 989864663 in words is "nine hundred eighty-nine million, eight hundred sixty-four thousand, six hundred sixty-three".