87671571 has 16 divisors (see below), whose sum is σ = 128960160. Its totient is φ = 52634880.

The previous prime is 87671569. The next prime is 87671587. The reversal of 87671571 is 17517678.

It is not a de Polignac number, because 87671571 - 2¹ = 87671569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87671531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25816 + ... + 29013.

It is an arithmetic number, because the mean of its divisors is an integer number (8060010).

Almost surely, 2^87671571 is an apocalyptic number.

87671571 is a deficient number, since it is larger than the sum of its proper divisors (41288589).

87671571 is a wasteful number, since it uses less digits than its factorization.

87671571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54886.

The product of its digits is 82320, while the sum is 42.

The square root of 87671571 is about 9363.3098314645. The cubic root of 87671571 is about 444.2419801413.

The spelling of 87671571 in words is "eighty-seven million, six hundred seventy-one thousand, five hundred seventy-one".