989030091 has 16 divisors (see below), whose sum is σ = 1547826944. Its totient is φ = 549885024.

The previous prime is 989030089. The next prime is 989030111. The reversal of 989030091 is 190030989.

It is not a de Polignac number, because 989030091 - 2¹ = 989030089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989030011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 635665 + ... + 637218.

It is an arithmetic number, because the mean of its divisors is an integer number (96739184).

Almost surely, 2^989030091 is an apocalyptic number.

989030091 is a deficient number, since it is larger than the sum of its proper divisors (558796853).

989030091 is a wasteful number, since it uses less digits than its factorization.

989030091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272930.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 989030091 is about 31448.8488024602. The cubic root of 989030091 is about 996.3299105885.

The spelling of 989030091 in words is "nine hundred eighty-nine million, thirty thousand, ninety-one".