199323686 has 4 divisors (see below), whose sum is σ = 298985532. Its totient is φ = 99661842.

The previous prime is 199323671. The next prime is 199323689. The reversal of 199323686 is 686323991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 686323991 = 6709 ⋅102299.

It is a self number, because there is not a number n which added to its sum of digits gives 199323686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199323689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49830920 + ... + 49830923.

It is an arithmetic number, because the mean of its divisors is an integer number (74746383).

Almost surely, 2^199323686 is an apocalyptic number.

199323686 is a deficient number, since it is larger than the sum of its proper divisors (99661846).

199323686 is an equidigital number, since it uses as much as digits as its factorization.

199323686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99661845.

The product of its digits is 419904, while the sum is 47.

The square root of 199323686 is about 14118.2040642569. The cubic root of 199323686 is about 584.1436185063.

The spelling of 199323686 in words is "one hundred ninety-nine million, three hundred twenty-three thousand, six hundred eighty-six".