871431687 has 24 divisors (see below), whose sum is σ = 1443929760. Its totient is φ = 496100160.

The previous prime is 871431683. The next prime is 871431697. The reversal of 871431687 is 786134178.

It is not a de Polignac number, because 871431687 - 2² = 871431683 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871431683) 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, 8764 + ... + 42657.

It is an arithmetic number, because the mean of its divisors is an integer number (60163740).

Almost surely, 2^871431687 is an apocalyptic number.

871431687 is a deficient number, since it is larger than the sum of its proper divisors (572498073).

871431687 is a wasteful number, since it uses less digits than its factorization.

871431687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51703 (or 51700 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 871431687 is about 29520.0217987724. The cubic root of 871431687 is about 955.1636414481.

It can be divided in two parts, 8714 and 31687, that added together give a square (40401 = 201²).

The spelling of 871431687 in words is "eight hundred seventy-one million, four hundred thirty-one thousand, six hundred eighty-seven".