85985285 has 4 divisors (see below), whose sum is σ = 103182348. Its totient is φ = 68788224.

The previous prime is 85985267. The next prime is 85985287. The reversal of 85985285 is 58258958.

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 46471489 + 39513796 = 6817^2 + 6286^2 .

It is a cyclic number.

It is not a de Polignac number, because 85985285 - 2¹⁶ = 85919749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85985287) 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, 8598524 + ... + 8598533.

It is an arithmetic number, because the mean of its divisors is an integer number (25795587).

Almost surely, 2^85985285 is an apocalyptic number.

It is an amenable number.

85985285 is a deficient number, since it is larger than the sum of its proper divisors (17197063).

85985285 is a wasteful number, since it uses less digits than its factorization.

85985285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17197062.

The product of its digits is 1152000, while the sum is 50.

The square root of 85985285 is about 9272.8250819262. The cubic root of 85985285 is about 441.3753195822.

The spelling of 85985285 in words is "eighty-five million, nine hundred eighty-five thousand, two hundred eighty-five".