85863687 has 32 divisors (see below), whose sum is σ = 141453312. Its totient is φ = 45114624.

The previous prime is 85863677. The next prime is 85863709. The reversal of 85863687 is 78636858.

It is not a de Polignac number, because 85863687 - 2⁷ = 85863559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85863607) 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 31 ways as a sum of consecutive naturals, for example, 99763 + ... + 100619.

It is an arithmetic number, because the mean of its divisors is an integer number (4420416).

Almost surely, 2^85863687 is an apocalyptic number.

85863687 is a deficient number, since it is larger than the sum of its proper divisors (55589625).

85863687 is a wasteful number, since it uses less digits than its factorization.

85863687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247.

The product of its digits is 1935360, while the sum is 51.

The square root of 85863687 is about 9266.2660764733. The cubic root of 85863687 is about 441.1671611913.

The spelling of 85863687 in words is "eighty-five million, eight hundred sixty-three thousand, six hundred eighty-seven".