990211 has 2 divisors, whose sum is σ = 990212. Its totient is φ = 990210.

The previous prime is 990181. The next prime is 990239. The reversal of 990211 is 112099.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 990211 - 2⁵ = 990179 is a prime.

It is a zygodrome in base 2.

It is not a weakly prime, because it can be changed into another prime (990281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495105 + 495106.

It is an arithmetic number, because the mean of its divisors is an integer number (495106).

2⁹⁹⁰²¹¹ is an apocalyptic number.

990211 is a deficient number, since it is larger than the sum of its proper divisors (1).

990211 is an equidigital number, since it uses as much as digits as its factorization.

990211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 990211 is about 995.0934629471. The cubic root of 990211 is about 99.6726294548.

The spelling of 990211 in words is "nine hundred ninety thousand, two hundred eleven".