871887218959 has 4 divisors (see below), whose sum is σ = 872813773800. Its totient is φ = 870960664120.

The previous prime is 871887218953. The next prime is 871887219013. The reversal of 871887218959 is 959812788178.

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 871887218959 - 2⁵ = 871887218927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 871887218891 and 871887218900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871887218953) 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, 463276009 + ... + 463277890.

It is an arithmetic number, because the mean of its divisors is an integer number (218203443450).

Almost surely, 2^871887218959 is an apocalyptic number.

871887218959 is a deficient number, since it is larger than the sum of its proper divisors (926554841).

871887218959 is an equidigital number, since it uses as much as digits as its factorization.

871887218959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926554840.

The product of its digits is 162570240, while the sum is 73.

The spelling of 871887218959 in words is "eight hundred seventy-one billion, eight hundred eighty-seven million, two hundred eighteen thousand, nine hundred fifty-nine".