85659905 has 4 divisors (see below), whose sum is σ = 102791892. Its totient is φ = 68527920.

The previous prime is 85659877. The next prime is 85659907. The reversal of 85659905 is 50995658.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65011969 + 20647936 = 8063^2 + 4544^2 .

It is not a de Polignac number, because 85659905 - 2¹⁴ = 85643521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85659905.

It is not an unprimeable number, because it can be changed into a prime (85659907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8565986 + ... + 8565995.

It is an arithmetic number, because the mean of its divisors is an integer number (25697973).

Almost surely, 2^85659905 is an apocalyptic number.

It is an amenable number.

85659905 is a deficient number, since it is larger than the sum of its proper divisors (17131987).

85659905 is a wasteful number, since it uses less digits than its factorization.

85659905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17131986.

The product of its (nonzero) digits is 486000, while the sum is 47.

The square root of 85659905 is about 9255.2636375200. The cubic root of 85659905 is about 440.8178744496.

The spelling of 85659905 in words is "eighty-five million, six hundred fifty-nine thousand, nine hundred five".