999901011 has 32 divisors (see below), whose sum is σ = 1474375680. Its totient is φ = 599940000.

The previous prime is 999900997. The next prime is 999901013. The reversal of 999901011 is 110109999.

It is not a de Polignac number, because 999901011 - 2¹⁰ = 999899987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (999901013) 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 31 ways as a sum of consecutive naturals, for example, 195436 + ... + 200486.

It is an arithmetic number, because the mean of its divisors is an integer number (46074240).

Almost surely, 2^999901011 is an apocalyptic number.

999901011 is a deficient number, since it is larger than the sum of its proper divisors (474474669).

999901011 is a wasteful number, since it uses less digits than its factorization.

999901011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5247.

The product of its (nonzero) digits is 6561, while the sum is 39.

The square root of 999901011 is about 31621.2114094321. The cubic root of 999901011 is about 999.9670025778.

The spelling of 999901011 in words is "nine hundred ninety-nine million, nine hundred one thousand, eleven".