871039871 has 4 divisors (see below), whose sum is σ = 938042952. Its totient is φ = 804036792.

The previous prime is 871039867. The next prime is 871039909. The reversal of 871039871 is 178930178.

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

It is not a de Polignac number, because 871039871 - 2² = 871039867 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 (871039811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33501521 + ... + 33501546.

It is an arithmetic number, because the mean of its divisors is an integer number (234510738).

Almost surely, 2^871039871 is an apocalyptic number.

871039871 is a deficient number, since it is larger than the sum of its proper divisors (67003081).

871039871 is a wasteful number, since it uses less digits than its factorization.

871039871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67003080.

The product of its (nonzero) digits is 84672, while the sum is 44.

The square root of 871039871 is about 29513.3846076657. The cubic root of 871039871 is about 955.0204653747.

The spelling of 871039871 in words is "eight hundred seventy-one million, thirty-nine thousand, eight hundred seventy-one".