845574089 has 2 divisors, whose sum is σ = 845574090. Its totient is φ = 845574088.

The previous prime is 845574077. The next prime is 845574097. The reversal of 845574089 is 980475548.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 475588864 + 369985225 = 21808^2 + 19235^2 .

It is a cyclic number.

It is not a de Polignac number, because 845574089 - 2¹² = 845569993 is a prime.

It is not a weakly prime, because it can be changed into another prime (845574019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422787044 + 422787045.

It is an arithmetic number, because the mean of its divisors is an integer number (422787045).

Almost surely, 2^845574089 is an apocalyptic number.

It is an amenable number.

845574089 is a deficient number, since it is larger than the sum of its proper divisors (1).

845574089 is an equidigital number, since it uses as much as digits as its factorization.

845574089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1612800, while the sum is 50.

The square root of 845574089 is about 29078.7566618657. The cubic root of 845574089 is about 945.6212478542.

The spelling of 845574089 in words is "eight hundred forty-five million, five hundred seventy-four thousand, eighty-nine".