199121834 has 8 divisors (see below), whose sum is σ = 300963168. Its totient is φ = 98800780.

The previous prime is 199121821. The next prime is 199121851. The reversal of 199121834 is 438121991.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 379742 + ... + 380265.

It is an arithmetic number, because the mean of its divisors is an integer number (37620396).

Almost surely, 2^199121834 is an apocalyptic number.

199121834 is a deficient number, since it is larger than the sum of its proper divisors (101841334).

199121834 is a wasteful number, since it uses less digits than its factorization.

199121834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760140.

The product of its digits is 15552, while the sum is 38.

The square root of 199121834 is about 14111.0536105565. The cubic root of 199121834 is about 583.9463675180.

The spelling of 199121834 in words is "one hundred ninety-nine million, one hundred twenty-one thousand, eight hundred thirty-four".