845640067 has 2 divisors, whose sum is σ = 845640068. Its totient is φ = 845640066.

The previous prime is 845640043. The next prime is 845640091. The reversal of 845640067 is 760046548.

845640067 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (845640043) and next prime (845640091).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-845640067 is a prime.

It is not a weakly prime, because it can be changed into another prime (845640007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422820033 + 422820034.

It is an arithmetic number, because the mean of its divisors is an integer number (422820034).

Almost surely, 2^845640067 is an apocalyptic number.

845640067 is a deficient number, since it is larger than the sum of its proper divisors (1).

845640067 is an equidigital number, since it uses as much as digits as its factorization.

845640067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 845640067 is about 29079.8911105252. The cubic root of 845640067 is about 945.6458420232.

The spelling of 845640067 in words is "eight hundred forty-five million, six hundred forty thousand, sixty-seven".