85184689 has 2 divisors, whose sum is σ = 85184690. Its totient is φ = 85184688.

The previous prime is 85184669. The next prime is 85184707. The reversal of 85184689 is 98648158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79352464 + 5832225 = 8908^2 + 2415^2 .

It is a cyclic number.

It is not a de Polignac number, because 85184689 - 2¹¹ = 85182641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85184639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42592344 + 42592345.

It is an arithmetic number, because the mean of its divisors is an integer number (42592345).

Almost surely, 2^85184689 is an apocalyptic number.

It is an amenable number.

85184689 is a deficient number, since it is larger than the sum of its proper divisors (1).

85184689 is an equidigital number, since it uses as much as digits as its factorization.

85184689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 552960, while the sum is 49.

The square root of 85184689 is about 9229.5551897153. Note that the first 3 decimals coincide. The cubic root of 85184689 is about 440.0011862916.

The spelling of 85184689 in words is "eighty-five million, one hundred eighty-four thousand, six hundred eighty-nine".