871110391 has 2 divisors, whose sum is σ = 871110392. Its totient is φ = 871110390.

The previous prime is 871110367. The next prime is 871110407. The reversal of 871110391 is 193011178.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 871110391 - 2⁷ = 871110263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (871111391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435555195 + 435555196.

It is an arithmetic number, because the mean of its divisors is an integer number (435555196).

Almost surely, 2^871110391 is an apocalyptic number.

871110391 is a deficient number, since it is larger than the sum of its proper divisors (1).

871110391 is an equidigital number, since it uses as much as digits as its factorization.

871110391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 31.

The square root of 871110391 is about 29514.5792956634. The cubic root of 871110391 is about 955.0462377218.

The spelling of 871110391 in words is "eight hundred seventy-one million, one hundred ten thousand, three hundred ninety-one".