199523 has 2 divisors, whose sum is σ = 199524. Its totient is φ = 199522.

The previous prime is 199501. The next prime is 199559. The reversal of 199523 is 325991.

199523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199523 - 2⁸ = 199267 is a prime.

It is not a weakly prime, because it can be changed into another prime (199583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99761 + 99762.

It is an arithmetic number, because the mean of its divisors is an integer number (99762).

2¹⁹⁹⁵²³ is an apocalyptic number.

199523 is a deficient number, since it is larger than the sum of its proper divisors (1).

199523 is an equidigital number, since it uses as much as digits as its factorization.

199523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2430, while the sum is 29.

The square root of 199523 is about 446.6799749261. The cubic root of 199523 is about 58.4338258721.

The spelling of 199523 in words is "one hundred ninety-nine thousand, five hundred twenty-three".