871347641 has 4 divisors (see below), whose sum is σ = 871467300. Its totient is φ = 871227984.

The previous prime is 871347629. The next prime is 871347683. The reversal of 871347641 is 146743178.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 161391616 + 709956025 = 12704^2 + 26645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-871347641 is a prime.

It is a super-2 number, since 2×871347641² = 1518493422952529762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (871347691) 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, 48146 + ... + 63723.

It is an arithmetic number, because the mean of its divisors is an integer number (217866825).

Almost surely, 2^871347641 is an apocalyptic number.

It is an amenable number.

871347641 is a deficient number, since it is larger than the sum of its proper divisors (119659).

871347641 is a wasteful number, since it uses less digits than its factorization.

871347641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119658.

The product of its digits is 112896, while the sum is 41.

The square root of 871347641 is about 29518.5982221379. The cubic root of 871347641 is about 955.1329332601.

The spelling of 871347641 in words is "eight hundred seventy-one million, three hundred forty-seven thousand, six hundred forty-one".