99611999 has 2 divisors, whose sum is σ = 99612000. Its totient is φ = 99611998.

The previous prime is 99611933. The next prime is 99612017. The reversal of 99611999 is 99911699.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99611999 - 2¹⁶ = 99546463 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99611999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99611909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49805999 + 49806000.

It is an arithmetic number, because the mean of its divisors is an integer number (49806000).

Almost surely, 2^99611999 is an apocalyptic number.

99611999 is a deficient number, since it is larger than the sum of its proper divisors (1).

99611999 is an equidigital number, since it uses as much as digits as its factorization.

99611999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 354294, while the sum is 53.

The square root of 99611999 is about 9980.5810953070. The cubic root of 99611999 is about 463.5577915726.

The spelling of 99611999 in words is "ninety-nine million, six hundred eleven thousand, nine hundred ninety-nine".