87317312017871 has 4 divisors (see below), whose sum is σ = 94034028326952. Its totient is φ = 80600595708792.

The previous prime is 87317312017849. The next prime is 87317312017891. The reversal of 87317312017871 is 17871021371378.

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 87317312017871 - 2⁶ = 87317312017807 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 (87317312017891) 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, 3358358154521 + ... + 3358358154546.

It is an arithmetic number, because the mean of its divisors is an integer number (23508507081738).

Almost surely, 2^{87317312017871} is an apocalyptic number.

87317312017871 is a deficient number, since it is larger than the sum of its proper divisors (6716716309081).

87317312017871 is a wasteful number, since it uses less digits than its factorization.

87317312017871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6716716309080.

The product of its (nonzero) digits is 2765952, while the sum is 56.

The spelling of 87317312017871 in words is "eighty-seven trillion, three hundred seventeen billion, three hundred twelve million, seventeen thousand, eight hundred seventy-one".