99011999 has 2 divisors, whose sum is σ = 99012000. Its totient is φ = 99011998.

The previous prime is 99011989. The next prime is 99012013. The reversal of 99011999 is 99911099.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99011999 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99011909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49505999 + 49506000.

It is an arithmetic number, because the mean of its divisors is an integer number (49506000).

Almost surely, 2^99011999 is an apocalyptic number.

99011999 is a deficient number, since it is larger than the sum of its proper divisors (1).

99011999 is an equidigital number, since it uses as much as digits as its factorization.

99011999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 59049, while the sum is 47.

The square root of 99011999 is about 9950.4773252342. The cubic root of 99011999 is about 462.6251897774.

It can be divided in two parts, 99011 and 999, that multiplied together give a palindrome (98911989).

The spelling of 99011999 in words is "ninety-nine million, eleven thousand, nine hundred ninety-nine".