871056993 has 12 divisors (see below), whose sum is σ = 1173544080. Its totient is φ = 574699392.

The previous prime is 871056971. The next prime is 871057073. The reversal of 871056993 is 399650178.

It is not a de Polignac number, because 871056993 - 2¹⁴ = 871040609 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (871056913) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12798 + ... + 43656.

It is an arithmetic number, because the mean of its divisors is an integer number (97795340).

Almost surely, 2^871056993 is an apocalyptic number.

It is an amenable number.

871056993 is a deficient number, since it is larger than the sum of its proper divisors (302487087).

871056993 is an equidigital number, since it uses as much as digits as its factorization.

871056993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31056 (or 30959 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 48.

The square root of 871056993 is about 29513.6746780200. The cubic root of 871056993 is about 955.0267229349.

It can be divided in two parts, 8710 and 56993, that added together give a triangular number (65703 = T₃₆₂).

The spelling of 871056993 in words is "eight hundred seventy-one million, fifty-six thousand, nine hundred ninety-three".