900001012 has 12 divisors (see below), whose sum is σ = 1667649060. Its totient is φ = 423529856.

The previous prime is 900001009. The next prime is 900001033. The reversal of 900001012 is 210100009.

It can be written as a sum of positive squares in 2 ways, for example, as 620308836 + 279692176 = 24906^2 + 16724^2 .

It is a junction number, because it is equal to n+sod(n) for n = 900000983 and 900001001.

It is a congruent number.

It is an unprimeable number.

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, 6617587 + ... + 6617722.

It is an arithmetic number, because the mean of its divisors is an integer number (138970755).

Almost surely, 2^900001012 is an apocalyptic number.

It is an amenable number.

900001012 is a deficient number, since it is larger than the sum of its proper divisors (767648048).

900001012 is a wasteful number, since it uses less digits than its factorization.

900001012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13235330 (or 13235328 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 900001012 is about 30000.0168666619. The cubic root of 900001012 is about 965.4897464852.

The spelling of 900001012 in words is "nine hundred million, one thousand, twelve".