9900900090899 has 2 divisors, whose sum is σ = 9900900090900. Its totient is φ = 9900900090898.

The previous prime is 9900900090787. The next prime is 9900900090929. The reversal of 9900900090899 is 9980900090099.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9900900090899 - 2²⁴ = 9900883313683 is a prime.

It is a super-3 number, since 3×9900900090899³ (a number of 40 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (9900900098899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4950450045449 + 4950450045450.

It is an arithmetic number, because the mean of its divisors is an integer number (4950450045450).

Almost surely, 2^{9900900090899} is an apocalyptic number.

9900900090899 is a deficient number, since it is larger than the sum of its proper divisors (1).

9900900090899 is an equidigital number, since it uses as much as digits as its factorization.

9900900090899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4251528, while the sum is 62.

The spelling of 9900900090899 in words is "nine trillion, nine hundred billion, nine hundred million, ninety thousand, eight hundred ninety-nine".