199799994 has 16 divisors (see below), whose sum is σ = 400259232. Its totient is φ = 66490128.

The previous prime is 199799989. The next prime is 199800017. The reversal of 199799994 is 499997991.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23484 + ... + 30839.

It is an arithmetic number, because the mean of its divisors is an integer number (25016202).

Almost surely, 2^199799994 is an apocalyptic number.

199799994 is an abundant number, since it is smaller than the sum of its proper divisors (200459238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199799994 is a wasteful number, since it uses less digits than its factorization.

199799994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54941.

The product of its digits is 14880348, while the sum is 66.

The square root of 199799994 is about 14135.0625750295. The cubic root of 199799994 is about 584.6085422605.

The spelling of 199799994 in words is "one hundred ninety-nine million, seven hundred ninety-nine thousand, nine hundred ninety-four".