871213839 has 8 divisors (see below), whose sum is σ = 1167700992. Its totient is φ = 577767960.

The previous prime is 871213831. The next prime is 871213867. The reversal of 871213839 is 938312178.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 871213839 - 2³ = 871213831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 871213839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871213831) 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 7 ways as a sum of consecutive naturals, for example, 759649 + ... + 760794.

It is an arithmetic number, because the mean of its divisors is an integer number (145962624).

Almost surely, 2^871213839 is an apocalyptic number.

871213839 is a deficient number, since it is larger than the sum of its proper divisors (296487153).

871213839 is a wasteful number, since it uses less digits than its factorization.

871213839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520637.

The product of its digits is 72576, while the sum is 42.

The square root of 871213839 is about 29516.3317334658. The cubic root of 871213839 is about 955.0840414696.

The spelling of 871213839 in words is "eight hundred seventy-one million, two hundred thirteen thousand, eight hundred thirty-nine".