99789071 has 2 divisors, whose sum is σ = 99789072. Its totient is φ = 99789070.

The previous prime is 99789023. The next prime is 99789077. The reversal of 99789071 is 17098799.

It is a strong prime.

It is an emirp because it is prime and its reverse (17098799) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99789071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99789077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49894535 + 49894536.

It is an arithmetic number, because the mean of its divisors is an integer number (49894536).

Almost surely, 2^99789071 is an apocalyptic number.

99789071 is a deficient number, since it is larger than the sum of its proper divisors (1).

99789071 is an equidigital number, since it uses as much as digits as its factorization.

99789071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 50.

The square root of 99789071 is about 9989.4479827466. The cubic root of 99789071 is about 463.8323050737.

The spelling of 99789071 in words is "ninety-nine million, seven hundred eighty-nine thousand, seventy-one".