8331989 has 4 divisors (see below), whose sum is σ = 8822124. Its totient is φ = 7841856.

The previous prime is 8331977. The next prime is 8331997. The reversal of 8331989 is 9891338.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5152900 + 3179089 = 2270^2 + 1783^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8331989 is a prime.

It is a super-2 number, since 2×8331989² = 138844081392242, 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 (8331289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245042 + ... + 245075.

It is an arithmetic number, because the mean of its divisors is an integer number (2205531).

Almost surely, 2^8331989 is an apocalyptic number.

It is an amenable number.

8331989 is a deficient number, since it is larger than the sum of its proper divisors (490135).

8331989 is a wasteful number, since it uses less digits than its factorization.

8331989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490134.

The product of its digits is 46656, while the sum is 41.

The square root of 8331989 is about 2886.5184911932. The cubic root of 8331989 is about 202.7291639236.

The spelling of 8331989 in words is "eight million, three hundred thirty-one thousand, nine hundred eighty-nine".