1001000099 has 4 divisors (see below), whose sum is σ = 1092000120. Its totient is φ = 910000080.

The previous prime is 1001000051. The next prime is 1001000107. The reversal of 1001000099 is 9900001001.

1001000099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1001000099 - 2¹⁶ = 1000934563 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1001000099.

It is not an unprimeable number, because it can be changed into a prime (1001000699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45499994 + ... + 45500015.

It is an arithmetic number, because the mean of its divisors is an integer number (273000030).

Almost surely, 2^1001000099 is an apocalyptic number.

1001000099 is a deficient number, since it is larger than the sum of its proper divisors (91000021).

1001000099 is an equidigital number, since it uses as much as digits as its factorization.

1001000099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91000020.

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 1001000099 is about 31638.5856036581. The cubic root of 1001000099 is about 1000.3332552619. Note that the first 3 decimals are identical.

The spelling of 1001000099 in words is "one billion, one million, ninety-nine", and thus it is an aban number and an uban number.