85390717 has 2 divisors, whose sum is σ = 85390718. Its totient is φ = 85390716.

The previous prime is 85390699. The next prime is 85390729. The reversal of 85390717 is 71709358.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58079641 + 27311076 = 7621^2 + 5226^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85390717 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85390717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85390757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42695358 + 42695359.

It is an arithmetic number, because the mean of its divisors is an integer number (42695359).

Almost surely, 2^85390717 is an apocalyptic number.

It is an amenable number.

85390717 is a deficient number, since it is larger than the sum of its proper divisors (1).

85390717 is an equidigital number, since it uses as much as digits as its factorization.

85390717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 85390717 is about 9240.7097671120. The cubic root of 85390717 is about 440.3556301840.

The spelling of 85390717 in words is "eighty-five million, three hundred ninety thousand, seven hundred seventeen".