9991300305 has 32 divisors (see below), whose sum is σ = 18339323904. Its totient is φ = 4550072256.

The previous prime is 9991300301. The next prime is 9991300321. The reversal of 9991300305 is 5030031999.

It is not a de Polignac number, because 9991300305 - 2² = 9991300301 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9991300301) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153289 + ... + 208518.

It is an arithmetic number, because the mean of its divisors is an integer number (573103872).

Almost surely, 2^9991300305 is an apocalyptic number.

It is an amenable number.

9991300305 is a deficient number, since it is larger than the sum of its proper divisors (8348023599).

9991300305 is a wasteful number, since it uses less digits than its factorization.

9991300305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362085.

The product of its (nonzero) digits is 32805, while the sum is 39.

The square root of 9991300305 is about 99956.4920602959. The cubic root of 9991300305 is about 2153.8097446123.

The spelling of 9991300305 in words is "nine billion, nine hundred ninety-one million, three hundred thousand, three hundred five".