989020989 has 32 divisors (see below), whose sum is σ = 1641636480. Its totient is φ = 583200000.

The previous prime is 989020961. The next prime is 989020997.

989020989 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 989020989 - 2⁹ = 989020477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989020909) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34012 + ... + 55989.

It is an arithmetic number, because the mean of its divisors is an integer number (51301140).

Almost surely, 2^989020989 is an apocalyptic number.

989020989 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

It is an amenable number.

989020989 is a deficient number, since it is larger than the sum of its proper divisors (652615491).

989020989 is a wasteful number, since it uses less digits than its factorization.

989020989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90058 (or 90052 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 54.

The square root of 989020989 is about 31448.7040909478. The cubic root of 989020989 is about 996.3268541859.

The spelling of 989020989 in words is "nine hundred eighty-nine million, twenty thousand, nine hundred eighty-nine".