8331689 has 2 divisors, whose sum is σ = 8331690. Its totient is φ = 8331688.

The previous prime is 8331679. The next prime is 8331691. The reversal of 8331689 is 9861338.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8323225 + 8464 = 2885^2 + 92^2 .

It is a cyclic number.

It is not a de Polignac number, because 8331689 - 2¹² = 8327593 is a prime.

Together with 8331691, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8331629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4165844 + 4165845.

It is an arithmetic number, because the mean of its divisors is an integer number (4165845).

Almost surely, 2^8331689 is an apocalyptic number.

It is an amenable number.

8331689 is a deficient number, since it is larger than the sum of its proper divisors (1).

8331689 is an equidigital number, since it uses as much as digits as its factorization.

8331689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 8331689 is about 2886.4665250094. The cubic root of 8331689 is about 202.7267307520.

The spelling of 8331689 in words is "eight million, three hundred thirty-one thousand, six hundred eighty-nine".