871801211 has 2 divisors, whose sum is σ = 871801212. Its totient is φ = 871801210.

The previous prime is 871801199. The next prime is 871801213. The reversal of 871801211 is 112108178.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 871801211 - 2¹⁰ = 871800187 is a prime.

Together with 871801213, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (871801213) 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, 435900605 + 435900606.

It is an arithmetic number, because the mean of its divisors is an integer number (435900606).

Almost surely, 2^871801211 is an apocalyptic number.

871801211 is a deficient number, since it is larger than the sum of its proper divisors (1).

871801211 is an equidigital number, since it uses as much as digits as its factorization.

871801211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 29.

The square root of 871801211 is about 29526.2800061234. The cubic root of 871801211 is about 955.2986323361.

Adding to 871801211 its reverse (112108178), we get a palindrome (983909389).

The spelling of 871801211 in words is "eight hundred seventy-one million, eight hundred one thousand, two hundred eleven".