199728499 has 2 divisors, whose sum is σ = 199728500. Its totient is φ = 199728498.

The previous prime is 199728491. The next prime is 199728547. The reversal of 199728499 is 994827991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199728499 - 2³ = 199728491 is a prime.

It is not a weakly prime, because it can be changed into another prime (199728491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99864249 + 99864250.

It is an arithmetic number, because the mean of its divisors is an integer number (99864250).

Almost surely, 2^199728499 is an apocalyptic number.

199728499 is a deficient number, since it is larger than the sum of its proper divisors (1).

199728499 is an equidigital number, since it uses as much as digits as its factorization.

199728499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 58.

The square root of 199728499 is about 14132.5333539320. The cubic root of 199728499 is about 584.5388032291.

The spelling of 199728499 in words is "one hundred ninety-nine million, seven hundred twenty-eight thousand, four hundred ninety-nine".