871587873 has 24 divisors (see below), whose sum is σ = 1392453608. Its totient is φ = 521862912.

The previous prime is 871587869. The next prime is 871587877. The reversal of 871587873 is 378785178.

It is an interprime number because it is at equal distance from previous prime (871587869) and next prime (871587877).

It can be written as a sum of positive squares in 4 ways, for example, as 90497169 + 781090704 = 9513^2 + 27948^2 .

It is not a de Polignac number, because 871587873 - 2² = 871587869 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (871587877) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96340 + ... + 104997.

Almost surely, 2^871587873 is an apocalyptic number.

It is an amenable number.

871587873 is a deficient number, since it is larger than the sum of its proper divisors (520865735).

871587873 is a wasteful number, since it uses less digits than its factorization.

871587873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201393 (or 201390 counting only the distinct ones).

The product of its digits is 2634240, while the sum is 54.

The square root of 871587873 is about 29522.6671051245. The cubic root of 871587873 is about 955.2207024429.

The spelling of 871587873 in words is "eight hundred seventy-one million, five hundred eighty-seven thousand, eight hundred seventy-three".