9991000306 has 8 divisors (see below), whose sum is σ = 17127429120. Its totient is φ = 4281857268.

The previous prime is 9991000303. The next prime is 9991000319. The reversal of 9991000306 is 6030001999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×9991000306² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9991000303) 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, 356821426 + ... + 356821453.

It is an arithmetic number, because the mean of its divisors is an integer number (2140928640).

Almost surely, 2^9991000306 is an apocalyptic number.

9991000306 is a deficient number, since it is larger than the sum of its proper divisors (7136428814).

9991000306 is a wasteful number, since it uses less digits than its factorization.

9991000306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713642888.

The product of its (nonzero) digits is 13122, while the sum is 37.

The square root of 9991000306 is about 99954.9914011301. The cubic root of 9991000306 is about 2153.7881876172.

The spelling of 9991000306 in words is "nine billion, nine hundred ninety-one million, three hundred six", and thus it is an aban number.