99891048091 has 2 divisors, whose sum is σ = 99891048092. Its totient is φ = 99891048090.

The previous prime is 99891048067. The next prime is 99891048199. The reversal of 99891048091 is 19084019899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99891048091 - 2¹⁷ = 99890917019 is a prime.

It is not a weakly prime, because it can be changed into another prime (99891028091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49945524045 + 49945524046.

It is an arithmetic number, because the mean of its divisors is an integer number (49945524046).

Almost surely, 2^99891048091 is an apocalyptic number.

99891048091 is a deficient number, since it is larger than the sum of its proper divisors (1).

99891048091 is an equidigital number, since it uses as much as digits as its factorization.

99891048091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1679616, while the sum is 58.

The spelling of 99891048091 in words is "ninety-nine billion, eight hundred ninety-one million, forty-eight thousand, ninety-one".