100001000999 has 2 divisors, whose sum is σ = 100001001000. Its totient is φ = 100001000998.

The previous prime is 100001000989. The next prime is 100001001011. The reversal of 100001000999 is 999000100001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100001000999 - 2¹² = 100000996903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100001000929) 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 as a sum of consecutive naturals, namely, 50000500499 + 50000500500.

It is an arithmetic number, because the mean of its divisors is an integer number (50000500500).

Almost surely, 2^100001000999 is an apocalyptic number.

100001000999 is a deficient number, since it is larger than the sum of its proper divisors (1).

100001000999 is an equidigital number, since it uses as much as digits as its factorization.

100001000999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 729, while the sum is 29.

The spelling of 100001000999 in words is "one hundred billion, one million, nine hundred ninety-nine", and thus it is an aban number.