990999999103 has 2 divisors, whose sum is σ = 990999999104. Its totient is φ = 990999999102.

The previous prime is 990999999097. The next prime is 990999999131. The reversal of 990999999103 is 301999999099.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 990999999103 - 2⁵ = 990999999071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 990999999103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990999999403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495499999551 + 495499999552.

It is an arithmetic number, because the mean of its divisors is an integer number (495499999552).

Almost surely, 2^990999999103 is an apocalyptic number.

990999999103 is a deficient number, since it is larger than the sum of its proper divisors (1).

990999999103 is an equidigital number, since it uses as much as digits as its factorization.

990999999103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129140163, while the sum is 76.

The spelling of 990999999103 in words is "nine hundred ninety billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, one hundred three".