999199 has 2 divisors, whose sum is σ = 999200. Its totient is φ = 999198.

The previous prime is 999181. The next prime is 999217. The reversal of 999199 is 991999.

It is a balanced prime because it is at equal distance from previous prime (999181) and next prime (999217).

It is an emirp because it is prime and its reverse (991999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999199 - 2⁹ = 998687 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499599 + 499600.

It is an arithmetic number, because the mean of its divisors is an integer number (499600).

2⁹⁹⁹¹⁹⁹ is an apocalyptic number.

999199 is a deficient number, since it is larger than the sum of its proper divisors (1).

999199 is an equidigital number, since it uses as much as digits as its factorization.

999199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 59049, while the sum is 46.

The square root of 999199 is about 999.5994197677. The cubic root of 999199 is about 99.9732928679.

The spelling of 999199 in words is "nine hundred ninety-nine thousand, one hundred ninety-nine".