999887099 has 2 divisors, whose sum is σ = 999887100. Its totient is φ = 999887098.

The previous prime is 999887087. The next prime is 999887123. The reversal of 999887099 is 990788999.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999887099 is a prime.

It is not a weakly prime, because it can be changed into another prime (999887599) 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, 499943549 + 499943550.

It is an arithmetic number, because the mean of its divisors is an integer number (499943550).

Almost surely, 2^999887099 is an apocalyptic number.

999887099 is a deficient number, since it is larger than the sum of its proper divisors (1).

999887099 is an equidigital number, since it uses as much as digits as its factorization.

999887099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26453952, while the sum is 68.

The square root of 999887099 is about 31620.9914297449. The cubic root of 999887099 is about 999.9623649170.

The spelling of 999887099 in words is "nine hundred ninety-nine million, eight hundred eighty-seven thousand, ninety-nine".