1000001099 has 2 divisors, whose sum is σ = 1000001100. Its totient is φ = 1000001098.

The previous prime is 1000001087. The next prime is 1000001137. The reversal of 1000001099 is 9901000001.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000001099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1000001099.

It is not a weakly prime, because it can be changed into another prime (1000001699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500000549 + 500000550.

It is an arithmetic number, because the mean of its divisors is an integer number (500000550).

Almost surely, 2^1000001099 is an apocalyptic number.

1000001099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000001099 is an equidigital number, since it uses as much as digits as its factorization.

1000001099 is an evil number, because the sum of its binary digits is even.

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

The square root of 1000001099 is about 31622.7939783948. The cubic root of 1000001099 is about 1000.0003663332. Note that the first 3 decimals are identical.

The spelling of 1000001099 in words is "one billion, one thousand, ninety-nine".