199790 has 8 divisors (see below), whose sum is σ = 359640. Its totient is φ = 79912.

The previous prime is 199783. The next prime is 199799. The reversal of 199790 is 97991.

It is a happy number.

199790 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 199790.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9980 + ... + 9999.

It is an arithmetic number, because the mean of its divisors is an integer number (44955).

2¹⁹⁹⁷⁹⁰ is an apocalyptic number.

199790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199790 is a deficient number, since it is larger than the sum of its proper divisors (159850).

199790 is a wasteful number, since it uses less digits than its factorization.

199790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19986.

The product of its (nonzero) digits is 5103, while the sum is 35.

The square root of 199790 is about 446.9787466983. The cubic root of 199790 is about 58.4598794721.

It can be divided in two parts, 199 and 790, that added together give a palindrome (989).

The spelling of 199790 in words is "one hundred ninety-nine thousand, seven hundred ninety".