999995812 has 12 divisors (see below), whose sum is σ = 1769656140. Its totient is φ = 494379776.

The previous prime is 999995809. The next prime is 999995813. The reversal of 999995812 is 218599999.

It can be written as a sum of positive squares in 2 ways, for example, as 718561636 + 281434176 = 26806^2 + 16776^2 .

It is not an unprimeable number, because it can be changed into a prime (999995813) 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, 1404133 + ... + 1404844.

It is an arithmetic number, because the mean of its divisors is an integer number (147471345).

Almost surely, 2^999995812 is an apocalyptic number.

It is an amenable number.

999995812 is a deficient number, since it is larger than the sum of its proper divisors (769660328).

999995812 is a wasteful number, since it uses less digits than its factorization.

999995812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2809070 (or 2809068 counting only the distinct ones).

The product of its digits is 4723920, while the sum is 61.

The square root of 999995812 is about 31622.7103835203. The cubic root of 999995812 is about 999.9986039981.

The spelling of 999995812 in words is "nine hundred ninety-nine million, nine hundred ninety-five thousand, eight hundred twelve".