199685834 has 8 divisors (see below), whose sum is σ = 299857440. Its totient is φ = 99733356.

The previous prime is 199685833. The next prime is 199685869. The reversal of 199685834 is 438586991.

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

It is not an unprimeable number, because it can be changed into a prime (199685831) 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, 52484 + ... + 56159.

It is an arithmetic number, because the mean of its divisors is an integer number (37482180).

Almost surely, 2^199685834 is an apocalyptic number.

199685834 is a deficient number, since it is larger than the sum of its proper divisors (100171606).

199685834 is a wasteful number, since it uses less digits than its factorization.

199685834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109564.

The product of its digits is 1866240, while the sum is 53.

The square root of 199685834 is about 14131.0238128736. The cubic root of 199685834 is about 584.4971781828.

The spelling of 199685834 in words is "one hundred ninety-nine million, six hundred eighty-five thousand, eight hundred thirty-four".