9909929911 has 4 divisors (see below), whose sum is σ = 11325634192. Its totient is φ = 8494225632.

The previous prime is 9909929899. The next prime is 9909929947. The reversal of 9909929911 is 1199299099.

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

It is a cyclic number.

It is not a de Polignac number, because 9909929911 - 2⁵ = 9909929879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9909929111) 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, 707852130 + ... + 707852143.

It is an arithmetic number, because the mean of its divisors is an integer number (2831408548).

Almost surely, 2^9909929911 is an apocalyptic number.

9909929911 is a deficient number, since it is larger than the sum of its proper divisors (1415704281).

9909929911 is a wasteful number, since it uses less digits than its factorization.

9909929911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415704280.

The product of its (nonzero) digits is 1062882, while the sum is 58.

The square root of 9909929911 is about 99548.6308846084. The cubic root of 9909929911 is about 2147.9468346680.

The spelling of 9909929911 in words is "nine billion, nine hundred nine million, nine hundred twenty-nine thousand, nine hundred eleven".