9128789 has 2 divisors, whose sum is σ = 9128790. Its totient is φ = 9128788.

The previous prime is 9128747. The next prime is 9128803. The reversal of 9128789 is 9878219.

9128789 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6848689 + 2280100 = 2617^2 + 1510^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9128789 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9128719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4564394 + 4564395.

It is an arithmetic number, because the mean of its divisors is an integer number (4564395).

Almost surely, 2^9128789 is an apocalyptic number.

It is an amenable number.

9128789 is a deficient number, since it is larger than the sum of its proper divisors (1).

9128789 is an equidigital number, since it uses as much as digits as its factorization.

9128789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 44.

The square root of 9128789 is about 3021.3885880502. The cubic root of 9128789 is about 208.9958791340.

The spelling of 9128789 in words is "nine million, one hundred twenty-eight thousand, seven hundred eighty-nine".