999506212 has 24 divisors (see below), whose sum is σ = 1758972600. Its totient is φ = 496951296.

The previous prime is 999506173. The next prime is 999506213. The reversal of 999506212 is 212605999.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 78747876 + 920758336 = 8874^2 + 30344^2 .

It is not an unprimeable number, because it can be changed into a prime (999506213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 900714 + ... + 901822.

It is an arithmetic number, because the mean of its divisors is an integer number (73290525).

Almost surely, 2^999506212 is an apocalyptic number.

It is an amenable number.

999506212 is a deficient number, since it is larger than the sum of its proper divisors (759466388).

999506212 is a wasteful number, since it uses less digits than its factorization.

999506212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2175 (or 2173 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 999506212 is about 31614.9681638302. The cubic root of 999506212 is about 999.8353769007.

The spelling of 999506212 in words is "nine hundred ninety-nine million, five hundred six thousand, two hundred twelve".