199994686 has 8 divisors (see below), whose sum is σ = 300151800. Its totient is φ = 99944088.

The previous prime is 199994633. The next prime is 199994689. The reversal of 199994686 is 686499991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199994689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21756 + ... + 29551.

It is an arithmetic number, because the mean of its divisors is an integer number (37518975).

Almost surely, 2^199994686 is an apocalyptic number.

199994686 is a deficient number, since it is larger than the sum of its proper divisors (100157114).

199994686 is a wasteful number, since it uses less digits than its factorization.

199994686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53258.

The product of its digits is 7558272, while the sum is 61.

The square root of 199994686 is about 14141.9477442112. The cubic root of 199994686 is about 584.7983681866.

The spelling of 199994686 in words is "one hundred ninety-nine million, nine hundred ninety-four thousand, six hundred eighty-six".