199699 has 6 divisors (see below), whose sum is σ = 212444. Its totient is φ = 187680.

The previous prime is 199697. The next prime is 199721. The reversal of 199699 is 996991.

It is not a de Polignac number, because 199699 - 2¹ = 199697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 57 + ... + 634.

2¹⁹⁹⁶⁹⁹ is an apocalyptic number.

199699 is a deficient number, since it is larger than the sum of its proper divisors (12745).

199699 is an equidigital number, since it uses as much as digits as its factorization.

199699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725 (or 708 counting only the distinct ones).

The product of its digits is 39366, while the sum is 43.

The square root of 199699 is about 446.8769405552. The cubic root of 199699 is about 58.4510023896.

It can be divided in two parts, 199 and 699, that added together give a palindrome (898).

The spelling of 199699 in words is "one hundred ninety-nine thousand, six hundred ninety-nine".