9991000367 has 2 divisors, whose sum is σ = 9991000368. Its totient is φ = 9991000366.

The previous prime is 9991000343. The next prime is 9991000379. The reversal of 9991000367 is 7630001999.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9991000367 - 2⁶ = 9991000303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9991000867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4995500183 + 4995500184.

It is an arithmetic number, because the mean of its divisors is an integer number (4995500184).

Almost surely, 2^9991000367 is an apocalyptic number.

9991000367 is a deficient number, since it is larger than the sum of its proper divisors (1).

9991000367 is an equidigital number, since it uses as much as digits as its factorization.

9991000367 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 9991000367 is about 99954.9917062675. The cubic root of 9991000367 is about 2153.7881920005.

The spelling of 9991000367 in words is "nine billion, nine hundred ninety-one million, three hundred sixty-seven", and thus it is an aban number.