871957823 has 12 divisors (see below), whose sum is σ = 1008879480. Its totient is φ = 750966480.

The previous prime is 871957769. The next prime is 871957841. The reversal of 871957823 is 328759178.

It is not a de Polignac number, because 871957823 - 2¹² = 871953727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871957843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187340 + ... + 191937.

It is an arithmetic number, because the mean of its divisors is an integer number (84073290).

Almost surely, 2^871957823 is an apocalyptic number.

871957823 is a deficient number, since it is larger than the sum of its proper divisors (136921657).

871957823 is a wasteful number, since it uses less digits than its factorization.

871957823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379318 (or 379307 counting only the distinct ones).

The product of its digits is 846720, while the sum is 50.

The square root of 871957823 is about 29528.9319651084. The cubic root of 871957823 is about 955.3558327887.

The spelling of 871957823 in words is "eight hundred seventy-one million, nine hundred fifty-seven thousand, eight hundred twenty-three".