999099090911 has 2 divisors, whose sum is σ = 999099090912. Its totient is φ = 999099090910.

The previous prime is 999099090883. The next prime is 999099090919. The reversal of 999099090911 is 119090990999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999099090911 - 2¹⁰ = 999099089887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999099090919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499549545455 + 499549545456.

It is an arithmetic number, because the mean of its divisors is an integer number (499549545456).

Almost surely, 2^999099090911 is an apocalyptic number.

999099090911 is a deficient number, since it is larger than the sum of its proper divisors (1).

999099090911 is an equidigital number, since it uses as much as digits as its factorization.

999099090911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4782969, while the sum is 65.

The spelling of 999099090911 in words is "nine hundred ninety-nine billion, ninety-nine million, ninety thousand, nine hundred eleven".