199490 has 8 divisors (see below), whose sum is σ = 359100. Its totient is φ = 79792.

The previous prime is 199489. The next prime is 199499. The reversal of 199490 is 94991.

It can be written as a sum of positive squares in 2 ways, for example, as 182329 + 17161 = 427^2 + 131^2 .

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

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (199499) 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 3 ways as a sum of consecutive naturals, for example, 9965 + ... + 9984.

2¹⁹⁹⁴⁹⁰ is an apocalyptic number.

199490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199490 is a deficient number, since it is larger than the sum of its proper divisors (159610).

199490 is a wasteful number, since it uses less digits than its factorization.

199490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19956.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 199490 is about 446.6430342007. The cubic root of 199490 is about 58.4306041507.

The spelling of 199490 in words is "one hundred ninety-nine thousand, four hundred ninety".