99108109109 has 4 divisors (see below), whose sum is σ = 99111297516. Its totient is φ = 99104920704.

The previous prime is 99108109099. The next prime is 99108109117. The reversal of 99108109109 is 90190180199.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 77492640625 + 21615468484 = 278375^2 + 147022^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99108109109 is a prime.

It is a super-2 number, since 2×99108109109² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99108169109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1547114 + ... + 1609899.

It is an arithmetic number, because the mean of its divisors is an integer number (24777824379).

Almost surely, 2^99108109109 is an apocalyptic number.

It is an amenable number.

99108109109 is a deficient number, since it is larger than the sum of its proper divisors (3188407).

99108109109 is a wasteful number, since it uses less digits than its factorization.

99108109109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3188406.

The product of its (nonzero) digits is 52488, while the sum is 47.

The spelling of 99108109109 in words is "ninety-nine billion, one hundred eight million, one hundred nine thousand, one hundred nine".