85856987 has 6 divisors (see below), whose sum is σ = 91204788. Its totient is φ = 80806304.

The previous prime is 85856957. The next prime is 85857001. The reversal of 85856987 is 78965858.

It is not a de Polignac number, because 85856987 - 2⁶ = 85856923 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85856917) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 148253 + ... + 148830.

It is an arithmetic number, because the mean of its divisors is an integer number (15200798).

Almost surely, 2^85856987 is an apocalyptic number.

85856987 is a deficient number, since it is larger than the sum of its proper divisors (5347801).

85856987 is a wasteful number, since it uses less digits than its factorization.

85856987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297117 (or 297100 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 56.

The square root of 85856987 is about 9265.9045430006. The cubic root of 85856987 is about 441.1556860382.

The spelling of 85856987 in words is "eighty-five million, eight hundred fifty-six thousand, nine hundred eighty-seven".