199999814 has 16 divisors (see below), whose sum is σ = 360902400. Its totient is φ = 81202824.

The previous prime is 199999777. The next prime is 199999819. The reversal of 199999814 is 418999991.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199999819) 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, 375674 + ... + 376205.

It is an arithmetic number, because the mean of its divisors is an integer number (22556400).

Almost surely, 2^199999814 is an apocalyptic number.

199999814 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

199999814 is a deficient number, since it is larger than the sum of its proper divisors (160902586).

199999814 is a wasteful number, since it uses less digits than its factorization.

199999814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751907.

The product of its digits is 1889568, while the sum is 59.

The square root of 199999814 is about 14142.1290476364. The cubic root of 199999814 is about 584.8033663534.

It can be divided in two parts, 1999998 and 14, that multiplied together give a palindrome (27999972).

The spelling of 199999814 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, eight hundred fourteen".