85604089 has 2 divisors, whose sum is σ = 85604090. Its totient is φ = 85604088.

The previous prime is 85604083. The next prime is 85604147. The reversal of 85604089 is 98040658.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59675625 + 25928464 = 7725^2 + 5092^2 .

It is a cyclic number.

It is not a de Polignac number, because 85604089 - 2³ = 85604081 is a prime.

It is not a weakly prime, because it can be changed into another prime (85604081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42802044 + 42802045.

It is an arithmetic number, because the mean of its divisors is an integer number (42802045).

Almost surely, 2^85604089 is an apocalyptic number.

It is an amenable number.

85604089 is a deficient number, since it is larger than the sum of its proper divisors (1).

85604089 is an equidigital number, since it uses as much as digits as its factorization.

85604089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 85604089 is about 9252.2477809449. The cubic root of 85604089 is about 440.7221079937.

The spelling of 85604089 in words is "eighty-five million, six hundred four thousand, eighty-nine".