199790323 has 2 divisors, whose sum is σ = 199790324. Its totient is φ = 199790322.

The previous prime is 199790303. The next prime is 199790329. The reversal of 199790323 is 323097991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199790323 - 2⁵ = 199790291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199790323.

It is not a weakly prime, because it can be changed into another prime (199790329) 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, 99895161 + 99895162.

It is an arithmetic number, because the mean of its divisors is an integer number (99895162).

Almost surely, 2^199790323 is an apocalyptic number.

199790323 is a deficient number, since it is larger than the sum of its proper divisors (1).

199790323 is an equidigital number, since it uses as much as digits as its factorization.

199790323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91854, while the sum is 43.

The square root of 199790323 is about 14134.7204783116. The cubic root of 199790323 is about 584.5991097603.

The spelling of 199790323 in words is "one hundred ninety-nine million, seven hundred ninety thousand, three hundred twenty-three".