85186987 has 8 divisors (see below), whose sum is σ = 87656576. Its totient is φ = 82726272.

The previous prime is 85186979. The next prime is 85186991. The reversal of 85186987 is 78968158.

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

It is a cyclic number.

It is not a de Polignac number, because 85186987 - 2³ = 85186979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85186957) 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, 20563 + ... + 24355.

It is an arithmetic number, because the mean of its divisors is an integer number (10957072).

Almost surely, 2^85186987 is an apocalyptic number.

85186987 is a deficient number, since it is larger than the sum of its proper divisors (2469589).

85186987 is a wasteful number, since it uses less digits than its factorization.

85186987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4437.

The product of its digits is 967680, while the sum is 52.

The square root of 85186987 is about 9229.6796802489. The cubic root of 85186987 is about 440.0051428462.

The spelling of 85186987 in words is "eighty-five million, one hundred eighty-six thousand, nine hundred eighty-seven".