199999223 has 2 divisors, whose sum is σ = 199999224. Its totient is φ = 199999222.

The previous prime is 199999201. The next prime is 199999231. The reversal of 199999223 is 322999991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199999223 - 2¹² = 199995127 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199992223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99999611 + 99999612.

It is an arithmetic number, because the mean of its divisors is an integer number (99999612).

Almost surely, 2^199999223 is an apocalyptic number.

199999223 is a deficient number, since it is larger than the sum of its proper divisors (1).

199999223 is an equidigital number, since it uses as much as digits as its factorization.

199999223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 708588, while the sum is 53.

The square root of 199999223 is about 14142.1081526058. The cubic root of 199999223 is about 584.8027903210.

The spelling of 199999223 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, two hundred twenty-three".