845620961 has 2 divisors, whose sum is σ = 845620962. Its totient is φ = 845620960.

The previous prime is 845620939. The next prime is 845620999. The reversal of 845620961 is 169026548.

It is a happy number.

845620961 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., 793492561 + 52128400 = 28169^2 + 7220^2 .

It is a cyclic number.

It is not a de Polignac number, because 845620961 - 2¹⁰ = 845619937 is a prime.

It is not a weakly prime, because it can be changed into another prime (845620901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422810480 + 422810481.

It is an arithmetic number, because the mean of its divisors is an integer number (422810481).

Almost surely, 2^845620961 is an apocalyptic number.

It is an amenable number.

845620961 is a deficient number, since it is larger than the sum of its proper divisors (1).

845620961 is an equidigital number, since it uses as much as digits as its factorization.

845620961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 845620961 is about 29079.5625998742. The cubic root of 845620961 is about 945.6387201415.

The spelling of 845620961 in words is "eight hundred forty-five million, six hundred twenty thousand, nine hundred sixty-one".