86785871 has 4 divisors (see below), whose sum is σ = 86805432. Its totient is φ = 86766312.

The previous prime is 86785849. The next prime is 86785913. The reversal of 86785871 is 17858768.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86785871 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 (86785841) 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, 425 + ... + 13181.

It is an arithmetic number, because the mean of its divisors is an integer number (21701358).

Almost surely, 2^86785871 is an apocalyptic number.

86785871 is a deficient number, since it is larger than the sum of its proper divisors (19561).

86785871 is a wasteful number, since it uses less digits than its factorization.

86785871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19560.

The product of its digits is 752640, while the sum is 50.

The square root of 86785871 is about 9315.8934622504. The cubic root of 86785871 is about 442.7409325573.

The spelling of 86785871 in words is "eighty-six million, seven hundred eighty-five thousand, eight hundred seventy-one".