871048641 has 4 divisors (see below), whose sum is σ = 1161398192. Its totient is φ = 580699092.

The previous prime is 871048637. The next prime is 871048667. The reversal of 871048641 is 146840178.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 871048641 - 2² = 871048637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 871048641.

It is not an unprimeable number, because it can be changed into a prime (871048741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145174771 + ... + 145174776.

It is an arithmetic number, because the mean of its divisors is an integer number (290349548).

Almost surely, 2^871048641 is an apocalyptic number.

It is an amenable number.

871048641 is a deficient number, since it is larger than the sum of its proper divisors (290349551).

871048641 is a wasteful number, since it uses less digits than its factorization.

871048641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290349550.

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 871048641 is about 29513.5331839480. The cubic root of 871048641 is about 955.0236705480.

The spelling of 871048641 in words is "eight hundred seventy-one million, forty-eight thousand, six hundred forty-one".