199318699 has 4 divisors (see below), whose sum is σ = 201253936. Its totient is φ = 197383464.

The previous prime is 199318687. The next prime is 199318709. The reversal of 199318699 is 996813991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 199318699 - 2¹⁹ = 198794411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199318649) 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, 967464 + ... + 967669.

It is an arithmetic number, because the mean of its divisors is an integer number (50313484).

Almost surely, 2^199318699 is an apocalyptic number.

199318699 is a deficient number, since it is larger than the sum of its proper divisors (1935237).

199318699 is a wasteful number, since it uses less digits than its factorization.

199318699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1935236.

The product of its digits is 944784, while the sum is 55.

The square root of 199318699 is about 14118.0274472038. The cubic root of 199318699 is about 584.1387467846.

The spelling of 199318699 in words is "one hundred ninety-nine million, three hundred eighteen thousand, six hundred ninety-nine".