99189799 has 2 divisors, whose sum is σ = 99189800. Its totient is φ = 99189798.

The previous prime is 99189767. The next prime is 99189803. The reversal of 99189799 is 99798199.

It is a strong prime.

It is an emirp because it is prime and its reverse (99798199) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99189799 - 2⁵ = 99189767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99189199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49594899 + 49594900.

It is an arithmetic number, because the mean of its divisors is an integer number (49594900).

Almost surely, 2^99189799 is an apocalyptic number.

99189799 is a deficient number, since it is larger than the sum of its proper divisors (1).

99189799 is an equidigital number, since it uses as much as digits as its factorization.

99189799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3306744, while the sum is 61.

The square root of 99189799 is about 9959.4075627017. The cubic root of 99189799 is about 462.9019426711.

Subtracting 99189799 from its reverse (99798199), we obtain a square (608400 = 780²).

The spelling of 99189799 in words is "ninety-nine million, one hundred eighty-nine thousand, seven hundred ninety-nine".