199690 has 16 divisors (see below), whose sum is σ = 378720. Its totient is φ = 75600.

The previous prime is 199687. The next prime is 199697. The reversal of 199690 is 96991.

It is a happy number.

199690 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×199690² = 79752192200, which contains 22 as substring.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336 + ... + 715.

It is an arithmetic number, because the mean of its divisors is an integer number (23670).

2¹⁹⁹⁶⁹⁰ is an apocalyptic number.

199690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199690 is a deficient number, since it is larger than the sum of its proper divisors (179030).

199690 is a wasteful number, since it uses less digits than its factorization.

199690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 199690 is about 446.8668705554. The cubic root of 199690 is about 58.4501242898.

The spelling of 199690 in words is "one hundred ninety-nine thousand, six hundred ninety".