99990211 has 4 divisors (see below), whose sum is σ = 100072800. Its totient is φ = 99907624.

The previous prime is 99990181. The next prime is 99990239. The reversal of 99990211 is 11209999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99990211 - 2⁷ = 99990083 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99990281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39451 + ... + 41908.

It is an arithmetic number, because the mean of its divisors is an integer number (25018200).

Almost surely, 2^99990211 is an apocalyptic number.

99990211 is a deficient number, since it is larger than the sum of its proper divisors (82589).

99990211 is a wasteful number, since it uses less digits than its factorization.

99990211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82588.

The product of its (nonzero) digits is 13122, while the sum is 40.

The square root of 99990211 is about 9999.5105380213. The cubic root of 99990211 is about 464.1437373627.

The spelling of 99990211 in words is "ninety-nine million, nine hundred ninety thousand, two hundred eleven".