871368647 has 4 divisors (see below), whose sum is σ = 873390816. Its totient is φ = 869346480.

The previous prime is 871368637. The next prime is 871368679. The reversal of 871368647 is 746863178.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-871368647 is a prime.

It is a super-2 number, since 2×871368647² = 1518566637949221218, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 871368595 and 871368604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871368637) 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, 1010438 + ... + 1011299.

It is an arithmetic number, because the mean of its divisors is an integer number (218347704).

Almost surely, 2^871368647 is an apocalyptic number.

871368647 is a deficient number, since it is larger than the sum of its proper divisors (2022169).

871368647 is a wasteful number, since it uses less digits than its factorization.

871368647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2022168.

The product of its digits is 1354752, while the sum is 50.

The square root of 871368647 is about 29518.9540295723. The cubic root of 871368647 is about 955.1406084826.

The spelling of 871368647 in words is "eight hundred seventy-one million, three hundred sixty-eight thousand, six hundred forty-seven".