999953211 has 4 divisors (see below), whose sum is σ = 1333270952. Its totient is φ = 666635472.

The previous prime is 999953191. The next prime is 999953287. The reversal of 999953211 is 112359999.

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

It is not a de Polignac number, because 999953211 - 2⁵ = 999953179 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (999953011) 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, 166658866 + ... + 166658871.

It is an arithmetic number, because the mean of its divisors is an integer number (333317738).

Almost surely, 2^999953211 is an apocalyptic number.

999953211 is a deficient number, since it is larger than the sum of its proper divisors (333317741).

999953211 is a wasteful number, since it uses less digits than its factorization.

999953211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333317740.

The product of its digits is 196830, while the sum is 48.

The square root of 999953211 is about 31622.0367939828. The cubic root of 999953211 is about 999.9844034234.

The spelling of 999953211 in words is "nine hundred ninety-nine million, nine hundred fifty-three thousand, two hundred eleven".