989020309 has 8 divisors (see below), whose sum is σ = 1032433920. Its totient is φ = 945641136.

The previous prime is 989020301. The next prime is 989020313. The reversal of 989020309 is 903020989.

It is a happy number.

989020309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 989020309 - 2³ = 989020301 is a prime.

It is a super-2 number, since 2×989020309² = 1956322343228910962, 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 (989020301) 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, 62772 + ... + 76930.

It is an arithmetic number, because the mean of its divisors is an integer number (129054240).

Almost surely, 2^989020309 is an apocalyptic number.

It is an amenable number.

989020309 is a deficient number, since it is larger than the sum of its proper divisors (43413611).

989020309 is a wasteful number, since it uses less digits than its factorization.

989020309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17219.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 989020309 is about 31448.6932796897. The cubic root of 989020309 is about 996.3266258448.

The spelling of 989020309 in words is "nine hundred eighty-nine million, twenty thousand, three hundred nine".