8909321 has 2 divisors, whose sum is σ = 8909322. Its totient is φ = 8909320.

The previous prime is 8909317. The next prime is 8909323. The reversal of 8909321 is 1239098.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6150400 + 2758921 = 2480^2 + 1661^2 .

It is a cyclic number.

It is not a de Polignac number, because 8909321 - 2² = 8909317 is a prime.

Together with 8909323, 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 (8909323) 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, 4454660 + 4454661.

It is an arithmetic number, because the mean of its divisors is an integer number (4454661).

Almost surely, 2^8909321 is an apocalyptic number.

It is an amenable number.

8909321 is a deficient number, since it is larger than the sum of its proper divisors (1).

8909321 is an equidigital number, since it uses as much as digits as its factorization.

8909321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 8909321 is about 2984.8485723735. The cubic root of 8909321 is about 207.3074305742.

The spelling of 8909321 in words is "eight million, nine hundred nine thousand, three hundred twenty-one".