199814 has 4 divisors (see below), whose sum is σ = 299724. Its totient is φ = 99906.

The previous prime is 199813. The next prime is 199819. The reversal of 199814 is 418991.

199814 = 222² + 223² + ... + 225².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 418991 = 23 ⋅18217.

It is a nialpdrome in base 12.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 199814.

It is not an unprimeable number, because it can be changed into a prime (199811) 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 as a sum of consecutive naturals, namely, 49952 + ... + 49955.

It is an arithmetic number, because the mean of its divisors is an integer number (74931).

2¹⁹⁹⁸¹⁴ is an apocalyptic number.

199814 is a deficient number, since it is larger than the sum of its proper divisors (99910).

199814 is an equidigital number, since it uses as much as digits as its factorization.

199814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99909.

The product of its digits is 2592, while the sum is 32.

The square root of 199814 is about 447.0055928062. The cubic root of 199814 is about 58.4622202314.

It can be divided in two parts, 1998 and 14, that multiplied together give a palindrome (27972).

The spelling of 199814 in words is "one hundred ninety-nine thousand, eight hundred fourteen".