9999090909919 has 2 divisors, whose sum is σ = 9999090909920. Its totient is φ = 9999090909918.

The previous prime is 9999090909911. The next prime is 9999090909947. The reversal of 9999090909919 is 9199090909999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9999090909919 - 2³ = 9999090909911 is a prime.

It is a super-2 number, since 2×9999090909919² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9999090909911) 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, 4999545454959 + 4999545454960.

It is an arithmetic number, because the mean of its divisors is an integer number (4999545454960).

Almost surely, 2^{9999090909919} is an apocalyptic number.

9999090909919 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999090909919 is an equidigital number, since it uses as much as digits as its factorization.

9999090909919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387420489, while the sum is 82.

The spelling of 9999090909919 in words is "nine trillion, nine hundred ninety-nine billion, ninety million, nine hundred nine thousand, nine hundred nineteen".