199690093 has 2 divisors, whose sum is σ = 199690094. Its totient is φ = 199690092.

The previous prime is 199690079. The next prime is 199690129. The reversal of 199690093 is 390096991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198612649 + 1077444 = 14093^2 + 1038^2 .

It is an emirp because it is prime and its reverse (390096991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199690093 - 2¹⁷ = 199559021 is a prime.

It is a super-2 number, since 2×199690093² = 79752266484697298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199690013) 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, 99845046 + 99845047.

It is an arithmetic number, because the mean of its divisors is an integer number (99845047).

Almost surely, 2^199690093 is an apocalyptic number.

It is an amenable number.

199690093 is a deficient number, since it is larger than the sum of its proper divisors (1).

199690093 is an equidigital number, since it uses as much as digits as its factorization.

199690093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 118098, while the sum is 46.

The square root of 199690093 is about 14131.1745088651. The cubic root of 199690093 is about 584.5013336367.

The spelling of 199690093 in words is "one hundred ninety-nine million, six hundred ninety thousand, ninety-three".