85864771 has 4 divisors (see below), whose sum is σ = 86339344. Its totient is φ = 85390200.

The previous prime is 85864769. The next prime is 85864787. The reversal of 85864771 is 17746858.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17746858 = 2 ⋅8873429.

It is a cyclic number.

It is not a de Polignac number, because 85864771 - 2¹ = 85864769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85864741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237015 + ... + 237376.

It is an arithmetic number, because the mean of its divisors is an integer number (21584836).

Almost surely, 2^85864771 is an apocalyptic number.

85864771 is a deficient number, since it is larger than the sum of its proper divisors (474573).

85864771 is a wasteful number, since it uses less digits than its factorization.

85864771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474572.

The product of its digits is 376320, while the sum is 46.

The square root of 85864771 is about 9266.3245680259. The cubic root of 85864771 is about 441.1690177122.

The spelling of 85864771 in words is "eighty-five million, eight hundred sixty-four thousand, seven hundred seventy-one".