9381389 has 2 divisors, whose sum is σ = 9381390. Its totient is φ = 9381388.

The previous prime is 9381367. The next prime is 9381391. The reversal of 9381389 is 9831839.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5929225 + 3452164 = 2435^2 + 1858^2 .

It is an emirp because it is prime and its reverse (9831839) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9381389 is a prime.

Together with 9381391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9381319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4690694 + 4690695.

It is an arithmetic number, because the mean of its divisors is an integer number (4690695).

Almost surely, 2^9381389 is an apocalyptic number.

It is an amenable number.

9381389 is a deficient number, since it is larger than the sum of its proper divisors (1).

9381389 is an equidigital number, since it uses as much as digits as its factorization.

9381389 is an odious number, because the sum of its binary digits is odd.

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

The square root of 9381389 is about 3062.9053201168. The cubic root of 9381389 is about 210.9060549267.

The spelling of 9381389 in words is "nine million, three hundred eighty-one thousand, three hundred eighty-nine".