989855667 has 8 divisors (see below), whose sum is σ = 1466452880. Its totient is φ = 659903760.

The previous prime is 989855639. The next prime is 989855677. The reversal of 989855667 is 766558989.

It is not a de Polignac number, because 989855667 - 2⁷ = 989855539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989855677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18330634 + ... + 18330687.

It is an arithmetic number, because the mean of its divisors is an integer number (183306610).

Almost surely, 2^989855667 is an apocalyptic number.

989855667 is a deficient number, since it is larger than the sum of its proper divisors (476597213).

989855667 is a wasteful number, since it uses less digits than its factorization.

989855667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36661330 (or 36661324 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 63.

The square root of 989855667 is about 31461.9717595703. The cubic root of 989855667 is about 996.6070566218.

The spelling of 989855667 in words is "nine hundred eighty-nine million, eight hundred fifty-five thousand, six hundred sixty-seven".