85305705 has 16 divisors (see below), whose sum is σ = 139394304. Its totient is φ = 44528000.

The previous prime is 85305697. The next prime is 85305709. The reversal of 85305705 is 50750358.

It is not a de Polignac number, because 85305705 - 2³ = 85305697 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85305709) 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 in 15 ways as a sum of consecutive naturals, for example, 59796 + ... + 61205.

It is an arithmetic number, because the mean of its divisors is an integer number (8712144).

Almost surely, 2^85305705 is an apocalyptic number.

It is an amenable number.

85305705 is a deficient number, since it is larger than the sum of its proper divisors (54088599).

85305705 is a wasteful number, since it uses less digits than its factorization.

85305705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121056.

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 85305705 is about 9236.1087585628. The cubic root of 85305705 is about 440.2094474599.

It can be divided in two parts, 85305 and 705, that multiplied together give a square (60140025 = 7755²).

The spelling of 85305705 in words is "eighty-five million, three hundred five thousand, seven hundred five".