85564693 has 2 divisors, whose sum is σ = 85564694. Its totient is φ = 85564692.

The previous prime is 85564667. The next prime is 85564741. The reversal of 85564693 is 39646558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46539684 + 39025009 = 6822^2 + 6247^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85564693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85564643) 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, 42782346 + 42782347.

It is an arithmetic number, because the mean of its divisors is an integer number (42782347).

Almost surely, 2^85564693 is an apocalyptic number.

It is an amenable number.

85564693 is a deficient number, since it is larger than the sum of its proper divisors (1).

85564693 is an equidigital number, since it uses as much as digits as its factorization.

85564693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 46.

The square root of 85564693 is about 9250.1185397810. The cubic root of 85564693 is about 440.6544891351.

The spelling of 85564693 in words is "eighty-five million, five hundred sixty-four thousand, six hundred ninety-three".