199318 has 16 divisors (see below), whose sum is σ = 357120. Its totient is φ = 81576.

The previous prime is 199313. The next prime is 199321. The reversal of 199318 is 813991.

It is a self number, because there is not a number n which added to its sum of digits gives 199318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199313) by changing a digit.

199318 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13 + ... + 631.

It is an arithmetic number, because the mean of its divisors is an integer number (22320).

2¹⁹⁹³¹⁸ is an apocalyptic number.

199318 is a deficient number, since it is larger than the sum of its proper divisors (157802).

199318 is a wasteful number, since it uses less digits than its factorization.

199318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651.

The product of its digits is 1944, while the sum is 31.

The square root of 199318 is about 446.4504451784. The cubic root of 199318 is about 58.4138063936.

The spelling of 199318 in words is "one hundred ninety-nine thousand, three hundred eighteen".