87866571 has 16 divisors (see below), whose sum is σ = 126342944. Its totient is φ = 53996544.

The previous prime is 87866563. The next prime is 87866573. The reversal of 87866571 is 17566878.

It is not a de Polignac number, because 87866571 - 2³ = 87866563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87866571.

It is not an unprimeable number, because it can be changed into a prime (87866573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42555 + ... + 44571.

It is an arithmetic number, because the mean of its divisors is an integer number (7896434).

Almost surely, 2^87866571 is an apocalyptic number.

87866571 is a deficient number, since it is larger than the sum of its proper divisors (38476373).

87866571 is a wasteful number, since it uses less digits than its factorization.

87866571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3150.

The product of its digits is 564480, while the sum is 48.

The square root of 87866571 is about 9373.7170322130. The cubic root of 87866571 is about 444.5710987624.

The spelling of 87866571 in words is "eighty-seven million, eight hundred sixty-six thousand, five hundred seventy-one".