871442843 has 2 divisors, whose sum is σ = 871442844. Its totient is φ = 871442842.

The previous prime is 871442821. The next prime is 871442849. The reversal of 871442843 is 348244178.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 871442843 - 2¹⁰ = 871441819 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 871442843.

It is not a weakly prime, because it can be changed into another prime (871442849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435721421 + 435721422.

It is an arithmetic number, because the mean of its divisors is an integer number (435721422).

Almost surely, 2^871442843 is an apocalyptic number.

871442843 is a deficient number, since it is larger than the sum of its proper divisors (1).

871442843 is an equidigital number, since it uses as much as digits as its factorization.

871442843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172032, while the sum is 41.

The square root of 871442843 is about 29520.2107546677. The cubic root of 871442843 is about 955.1677174074.

The spelling of 871442843 in words is "eight hundred seventy-one million, four hundred forty-two thousand, eight hundred forty-three".