199646 has 4 divisors (see below), whose sum is σ = 299472. Its totient is φ = 99822.

The previous prime is 199637. The next prime is 199657. The reversal of 199646 is 646991.

199646 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

199646 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49910 + ... + 49913.

It is an arithmetic number, because the mean of its divisors is an integer number (74868).

2¹⁹⁹⁶⁴⁶ is an apocalyptic number.

199646 is a deficient number, since it is larger than the sum of its proper divisors (99826).

199646 is an equidigital number, since it uses as much as digits as its factorization.

199646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99825.

The product of its digits is 11664, while the sum is 35.

The square root of 199646 is about 446.8176361783. The cubic root of 199646 is about 58.4458309779.

The spelling of 199646 in words is "one hundred ninety-nine thousand, six hundred forty-six".