989668 has 12 divisors (see below), whose sum is σ = 1739052. Its totient is φ = 492800.

The previous prime is 989663. The next prime is 989671. The reversal of 989668 is 866989.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 529984 + 459684 = 728^2 + 678^2 .

It is not an unprimeable number, because it can be changed into a prime (989663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1296 + ... + 1912.

It is an arithmetic number, because the mean of its divisors is an integer number (144921).

2⁹⁸⁹⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

989668 is a deficient number, since it is larger than the sum of its proper divisors (749384).

989668 is a wasteful number, since it uses less digits than its factorization.

989668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022 (or 1020 counting only the distinct ones).

The product of its digits is 186624, while the sum is 46.

The square root of 989668 is about 994.8205868397. The cubic root of 989668 is about 99.6544070309.

The spelling of 989668 in words is "nine hundred eighty-nine thousand, six hundred sixty-eight".