845786321 has 2 divisors, whose sum is σ = 845786322. Its totient is φ = 845786320.

The previous prime is 845786317. The next prime is 845786339. The reversal of 845786321 is 123687548.

845786321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 540795025 + 304991296 = 23255^2 + 17464^2 .

It is a cyclic number.

It is not a de Polignac number, because 845786321 - 2² = 845786317 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (845786341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422893160 + 422893161.

It is an arithmetic number, because the mean of its divisors is an integer number (422893161).

Almost surely, 2^845786321 is an apocalyptic number.

It is an amenable number.

845786321 is a deficient number, since it is larger than the sum of its proper divisors (1).

845786321 is an equidigital number, since it uses as much as digits as its factorization.

845786321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 44.

The square root of 845786321 is about 29082.4056948527. The cubic root of 845786321 is about 945.7003555686.

The spelling of 845786321 in words is "eight hundred forty-five million, seven hundred eighty-six thousand, three hundred twenty-one".