85189289 has 2 divisors, whose sum is σ = 85189290. Its totient is φ = 85189288.

The previous prime is 85189259. The next prime is 85189297. The reversal of 85189289 is 98298158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83905600 + 1283689 = 9160^2 + 1133^2 .

It is a cyclic number.

It is not a de Polignac number, because 85189289 - 2²⁰ = 84140713 is a prime.

It is not a weakly prime, because it can be changed into another prime (85189249) 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, 42594644 + 42594645.

It is an arithmetic number, because the mean of its divisors is an integer number (42594645).

Almost surely, 2^85189289 is an apocalyptic number.

It is an amenable number.

85189289 is a deficient number, since it is larger than the sum of its proper divisors (1).

85189289 is an equidigital number, since it uses as much as digits as its factorization.

85189289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414720, while the sum is 50.

The square root of 85189289 is about 9229.8043857928. The cubic root of 85189289 is about 440.0091062165.

The spelling of 85189289 in words is "eighty-five million, one hundred eighty-nine thousand, two hundred eighty-nine".