199946 has 8 divisors (see below), whose sum is σ = 301860. Its totient is φ = 99328.

The previous prime is 199933. The next prime is 199961. The reversal of 199946 is 649991.

It can be written as a sum of positive squares in 2 ways, for example, as 192721 + 7225 = 439^2 + 85^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

Its product of digits (17496) is a multiple of the sum of its prime divisors (648).

It is an unprimeable number.

199946 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 (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320 + ... + 708.

2¹⁹⁹⁹⁴⁶ is an apocalyptic number.

199946 is a deficient number, since it is larger than the sum of its proper divisors (101914).

199946 is a wasteful number, since it uses less digits than its factorization.

199946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648.

The product of its digits is 17496, while the sum is 38.

The square root of 199946 is about 447.1532175888. The cubic root of 199946 is about 58.4750910586.

The spelling of 199946 in words is "one hundred ninety-nine thousand, nine hundred forty-six".