85066109 has 2 divisors, whose sum is σ = 85066110. Its totient is φ = 85066108.

The previous prime is 85066067. The next prime is 85066123. The reversal of 85066109 is 90166058.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84732025 + 334084 = 9205^2 + 578^2 .

It is a cyclic number.

It is not a de Polignac number, because 85066109 - 2⁸ = 85065853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85066129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42533054 + 42533055.

It is an arithmetic number, because the mean of its divisors is an integer number (42533055).

Almost surely, 2^85066109 is an apocalyptic number.

It is an amenable number.

85066109 is a deficient number, since it is larger than the sum of its proper divisors (1).

85066109 is an equidigital number, since it uses as much as digits as its factorization.

85066109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 85066109 is about 9223.1290243604. The cubic root of 85066109 is about 439.7969259173.

The spelling of 85066109 in words is "eighty-five million, sixty-six thousand, one hundred nine".