871992911 has 2 divisors, whose sum is σ = 871992912. Its totient is φ = 871992910.

The previous prime is 871992899. The next prime is 871992929. The reversal of 871992911 is 119299178.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 871992911 - 2¹⁴ = 871976527 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (871992931) 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, 435996455 + 435996456.

It is an arithmetic number, because the mean of its divisors is an integer number (435996456).

Almost surely, 2^871992911 is an apocalyptic number.

871992911 is a deficient number, since it is larger than the sum of its proper divisors (1).

871992911 is an equidigital number, since it uses as much as digits as its factorization.

871992911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 47.

The square root of 871992911 is about 29529.5260883069. The cubic root of 871992911 is about 955.3686472754.

The spelling of 871992911 in words is "eight hundred seventy-one million, nine hundred ninety-two thousand, nine hundred eleven".