8320289 has 2 divisors, whose sum is σ = 8320290. Its totient is φ = 8320288.

The previous prime is 8320267. The next prime is 8320313. The reversal of 8320289 is 9820238.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6451600 + 1868689 = 2540^2 + 1367^2 .

It is a cyclic number.

It is not a de Polignac number, because 8320289 - 2⁸ = 8320033 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8320219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4160144 + 4160145.

It is an arithmetic number, because the mean of its divisors is an integer number (4160145).

Almost surely, 2^8320289 is an apocalyptic number.

It is an amenable number.

8320289 is a deficient number, since it is larger than the sum of its proper divisors (1).

8320289 is an equidigital number, since it uses as much as digits as its factorization.

8320289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 8320289 is about 2884.4911162976. The cubic root of 8320289 is about 202.6342269153.

The spelling of 8320289 in words is "eight million, three hundred twenty thousand, two hundred eighty-nine".