87671017871 has 4 divisors (see below), whose sum is σ = 87673203192. Its totient is φ = 87668832552.

The previous prime is 87671017867. The next prime is 87671017873. The reversal of 87671017871 is 17871017678.

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

It is a cyclic number.

It is not a de Polignac number, because 87671017871 - 2² = 87671017867 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 (87671017873) 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, 1031336 + ... + 1113101.

It is an arithmetic number, because the mean of its divisors is an integer number (21918300798).

Almost surely, 2^87671017871 is an apocalyptic number.

87671017871 is a deficient number, since it is larger than the sum of its proper divisors (2185321).

87671017871 is a wasteful number, since it uses less digits than its factorization.

87671017871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2185320.

The product of its (nonzero) digits is 921984, while the sum is 53.

The spelling of 87671017871 in words is "eighty-seven billion, six hundred seventy-one million, seventeen thousand, eight hundred seventy-one".