99985191071 has 2 divisors, whose sum is σ = 99985191072. Its totient is φ = 99985191070.

The previous prime is 99985191011. The next prime is 99985191091. The reversal of 99985191071 is 17019158999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99985191071 - 2³⁴ = 82805321887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99985191071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99985191011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49992595535 + 49992595536.

It is an arithmetic number, because the mean of its divisors is an integer number (49992595536).

Almost surely, 2^99985191071 is an apocalyptic number.

99985191071 is a deficient number, since it is larger than the sum of its proper divisors (1).

99985191071 is an equidigital number, since it uses as much as digits as its factorization.

99985191071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1837080, while the sum is 59.

The spelling of 99985191071 in words is "ninety-nine billion, nine hundred eighty-five million, one hundred ninety-one thousand, seventy-one".