9908952209 has 4 divisors (see below), whose sum is σ = 10671179316. Its totient is φ = 9146725104.

The previous prime is 9908952173. The next prime is 9908952211. The reversal of 9908952209 is 9022598099.

9908952209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9022598099 = 30013 ⋅300623.

It can be written as a sum of positive squares in 2 ways, for example, as 743761984 + 9165190225 = 27272^2 + 95735^2 .

It is a cyclic number.

It is not a de Polignac number, because 9908952209 - 2²⁰ = 9907903633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9908952269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381113534 + ... + 381113559.

It is an arithmetic number, because the mean of its divisors is an integer number (2667794829).

Almost surely, 2^9908952209 is an apocalyptic number.

It is an amenable number.

9908952209 is a deficient number, since it is larger than the sum of its proper divisors (762227107).

9908952209 is a wasteful number, since it uses less digits than its factorization.

9908952209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762227106.

The product of its (nonzero) digits is 1049760, while the sum is 53.

The square root of 9908952209 is about 99543.7200882105. The cubic root of 9908952209 is about 2147.8761943775.

The spelling of 9908952209 in words is "nine billion, nine hundred eight million, nine hundred fifty-two thousand, two hundred nine".