99868211 has 2 divisors, whose sum is σ = 99868212. Its totient is φ = 99868210.

The previous prime is 99868207. The next prime is 99868213. The reversal of 99868211 is 11286899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99868211 - 2² = 99868207 is a prime.

It is a Sophie Germain prime.

Together with 99868213, 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 (99868213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49934105 + 49934106.

It is an arithmetic number, because the mean of its divisors is an integer number (49934106).

Almost surely, 2^99868211 is an apocalyptic number.

99868211 is a deficient number, since it is larger than the sum of its proper divisors (1).

99868211 is an equidigital number, since it uses as much as digits as its factorization.

99868211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 44.

The square root of 99868211 is about 9993.4083775257. The cubic root of 99868211 is about 463.9548902713.

The spelling of 99868211 in words is "ninety-nine million, eight hundred sixty-eight thousand, two hundred eleven".