845605961 has 2 divisors, whose sum is σ = 845605962. Its totient is φ = 845605960.

The previous prime is 845605951. The next prime is 845605987. The reversal of 845605961 is 169506548.

845605961 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., 834343225 + 11262736 = 28885^2 + 3356^2 .

It is a cyclic number.

It is not a de Polignac number, because 845605961 - 2⁶ = 845605897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (845605951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422802980 + 422802981.

It is an arithmetic number, because the mean of its divisors is an integer number (422802981).

Almost surely, 2^845605961 is an apocalyptic number.

It is an amenable number.

845605961 is a deficient number, since it is larger than the sum of its proper divisors (1).

845605961 is an equidigital number, since it uses as much as digits as its factorization.

845605961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 845605961 is about 29079.3046856351. The cubic root of 845605961 is about 945.6331287220.

The spelling of 845605961 in words is "eight hundred forty-five million, six hundred five thousand, nine hundred sixty-one".