85303709 has 2 divisors, whose sum is σ = 85303710. Its totient is φ = 85303708.

The previous prime is 85303679. The next prime is 85303733. The reversal of 85303709 is 90730358.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78943225 + 6360484 = 8885^2 + 2522^2 .

It is a cyclic number.

It is not a de Polignac number, because 85303709 - 2¹⁶ = 85238173 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85303769) 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, 42651854 + 42651855.

It is an arithmetic number, because the mean of its divisors is an integer number (42651855).

Almost surely, 2^85303709 is an apocalyptic number.

It is an amenable number.

85303709 is a deficient number, since it is larger than the sum of its proper divisors (1).

85303709 is an equidigital number, since it uses as much as digits as its factorization.

85303709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 85303709 is about 9236.0007037678. Note that the first 3 decimals coincide. The cubic root of 85303709 is about 440.2060140635.

The spelling of 85303709 in words is "eighty-five million, three hundred three thousand, seven hundred nine".