85187985 has 8 divisors (see below), whose sum is σ = 136300800. Its totient is φ = 45433584.

The previous prime is 85187981. The next prime is 85187989. The reversal of 85187985 is 58978158.

It is an interprime number because it is at equal distance from previous prime (85187981) and next prime (85187989).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85187985 - 2² = 85187981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85187981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2839585 + ... + 2839614.

It is an arithmetic number, because the mean of its divisors is an integer number (17037600).

Almost surely, 2^85187985 is an apocalyptic number.

It is an amenable number.

85187985 is a deficient number, since it is larger than the sum of its proper divisors (51112815).

85187985 is a wasteful number, since it uses less digits than its factorization.

85187985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5679207.

The product of its digits is 806400, while the sum is 51.

The square root of 85187985 is about 9229.7337448054. The cubic root of 85187985 is about 440.0068611189.

The spelling of 85187985 in words is "eighty-five million, one hundred eighty-seven thousand, nine hundred eighty-five".