85787271 has 6 divisors (see below), whose sum is σ = 123914960. Its totient is φ = 57191508.

The previous prime is 85787257. The next prime is 85787281. The reversal of 85787271 is 17278758.

85787271 is a `hidden beast` number, since 8 + 578 + 7 + 2 + 71 = 666.

It is not a de Polignac number, because 85787271 - 2⁹ = 85786759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85787281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4765951 + ... + 4765968.

Almost surely, 2^85787271 is an apocalyptic number.

85787271 is a deficient number, since it is larger than the sum of its proper divisors (38127689).

85787271 is a wasteful number, since it uses less digits than its factorization.

85787271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9531925 (or 9531922 counting only the distinct ones).

The product of its digits is 219520, while the sum is 45.

The square root of 85787271 is about 9262.1418149368. The cubic root of 85787271 is about 441.0362473484.

The spelling of 85787271 in words is "eighty-five million, seven hundred eighty-seven thousand, two hundred seventy-one".