845560321 has 2 divisors, whose sum is σ = 845560322. Its totient is φ = 845560320.

The previous prime is 845560291. The next prime is 845560333. The reversal of 845560321 is 123065548.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 758231296 + 87329025 = 27536^2 + 9345^2 .

It is a cyclic number.

It is not a de Polignac number, because 845560321 - 2⁹ = 845559809 is a prime.

It is not a weakly prime, because it can be changed into another prime (845560351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422780160 + 422780161.

It is an arithmetic number, because the mean of its divisors is an integer number (422780161).

Almost surely, 2^845560321 is an apocalyptic number.

It is an amenable number.

845560321 is a deficient number, since it is larger than the sum of its proper divisors (1).

845560321 is an equidigital number, since it uses as much as digits as its factorization.

845560321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 845560321 is about 29078.5199245078. The cubic root of 845560321 is about 945.6161154895.

The spelling of 845560321 in words is "eight hundred forty-five million, five hundred sixty thousand, three hundred twenty-one".