85804643 has 2 divisors, whose sum is σ = 85804644. Its totient is φ = 85804642.

The previous prime is 85804619. The next prime is 85804699. The reversal of 85804643 is 34640858.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85804643 - 2⁸ = 85804387 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 85804597 and 85804606.

It is not a weakly prime, because it can be changed into another prime (85804603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42902321 + 42902322.

It is an arithmetic number, because the mean of its divisors is an integer number (42902322).

Almost surely, 2^85804643 is an apocalyptic number.

85804643 is a deficient number, since it is larger than the sum of its proper divisors (1).

85804643 is an equidigital number, since it uses as much as digits as its factorization.

85804643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 92160, while the sum is 38.

The square root of 85804643 is about 9263.0795635145. The cubic root of 85804643 is about 441.0660154189.

The spelling of 85804643 in words is "eighty-five million, eight hundred four thousand, six hundred forty-three".