868191211 has 2 divisors, whose sum is σ = 868191212. Its totient is φ = 868191210.

The previous prime is 868191169. The next prime is 868191217. The reversal of 868191211 is 112191868.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 868191211 - 2²⁷ = 733973483 is a prime.

It is not a weakly prime, because it can be changed into another prime (868191217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434095605 + 434095606.

It is an arithmetic number, because the mean of its divisors is an integer number (434095606).

Almost surely, 2^868191211 is an apocalyptic number.

868191211 is a deficient number, since it is larger than the sum of its proper divisors (1).

868191211 is an equidigital number, since it uses as much as digits as its factorization.

868191211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 37.

The square root of 868191211 is about 29465.0846087365. The cubic root of 868191211 is about 953.9782246230.

The spelling of 868191211 in words is "eight hundred sixty-eight million, one hundred ninety-one thousand, two hundred eleven".