99993911 has 2 divisors, whose sum is σ = 99993912. Its totient is φ = 99993910.

The previous prime is 99993893. The next prime is 99993917. The reversal of 99993911 is 11939999.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99993911 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99993911.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99993917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49996955 + 49996956.

It is an arithmetic number, because the mean of its divisors is an integer number (49996956).

Almost surely, 2^99993911 is an apocalyptic number.

99993911 is a deficient number, since it is larger than the sum of its proper divisors (1).

99993911 is an equidigital number, since it uses as much as digits as its factorization.

99993911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 177147, while the sum is 50.

The square root of 99993911 is about 9999.6955453654. The cubic root of 99993911 is about 464.1494622919.

The spelling of 99993911 in words is "ninety-nine million, nine hundred ninety-three thousand, nine hundred eleven".