871648631 has 8 divisors (see below), whose sum is σ = 996395520. Its totient is φ = 746958168.

The previous prime is 871648597. The next prime is 871648649. The reversal of 871648631 is 136846178.

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

It is a cyclic number.

It is not a de Polignac number, because 871648631 - 2²² = 867454327 is a prime.

It is a super-2 number, since 2×871648631² = 1519542671848348322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871648681) 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, 26990 + ... + 49716.

It is an arithmetic number, because the mean of its divisors is an integer number (124549440).

Almost surely, 2^871648631 is an apocalyptic number.

871648631 is a deficient number, since it is larger than the sum of its proper divisors (124746889).

871648631 is a wasteful number, since it uses less digits than its factorization.

871648631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28213.

The product of its digits is 193536, while the sum is 44.

The square root of 871648631 is about 29523.6960931385. The cubic root of 871648631 is about 955.2428979295.

The spelling of 871648631 in words is "eight hundred seventy-one million, six hundred forty-eight thousand, six hundred thirty-one".