990110109917 has 2 divisors, whose sum is σ = 990110109918. Its totient is φ = 990110109916.

The previous prime is 990110109899. The next prime is 990110109929. The reversal of 990110109917 is 719901011099.

990110109917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 750312834436 + 239797275481 = 866206^2 + 489691^2 .

It is an emirp because it is prime and its reverse (719901011099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 990110109917 - 2¹⁰ = 990110108893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990110109977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495055054958 + 495055054959.

It is an arithmetic number, because the mean of its divisors is an integer number (495055054959).

Almost surely, 2^990110109917 is an apocalyptic number.

It is an amenable number.

990110109917 is a deficient number, since it is larger than the sum of its proper divisors (1).

990110109917 is an equidigital number, since it uses as much as digits as its factorization.

990110109917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45927, while the sum is 47.

The spelling of 990110109917 in words is "nine hundred ninety billion, one hundred ten million, one hundred nine thousand, nine hundred seventeen".