9991000303 has 2 divisors, whose sum is σ = 9991000304. Its totient is φ = 9991000302.

The previous prime is 9991000297. The next prime is 9991000319. The reversal of 9991000303 is 3030001999.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9991000303 - 2¹³ = 9990992111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9991000343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4995500151 + 4995500152.

It is an arithmetic number, because the mean of its divisors is an integer number (4995500152).

Almost surely, 2^9991000303 is an apocalyptic number.

9991000303 is a deficient number, since it is larger than the sum of its proper divisors (1).

9991000303 is an equidigital number, since it uses as much as digits as its factorization.

9991000303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6561, while the sum is 34.

The square root of 9991000303 is about 99954.9913861234. The cubic root of 9991000303 is about 2153.7881874016.

The spelling of 9991000303 in words is "nine billion, nine hundred ninety-one million, three hundred three", and thus it is an aban number.