199771738 has 16 divisors (see below), whose sum is σ = 318558240. Its totient is φ = 93690000.

The previous prime is 199771729. The next prime is 199771751. The reversal of 199771738 is 837177991.

199771738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 22188 + ... + 29863.

It is an arithmetic number, because the mean of its divisors is an integer number (19909890).

Almost surely, 2^199771738 is an apocalyptic number.

199771738 is a deficient number, since it is larger than the sum of its proper divisors (118786502).

199771738 is a wasteful number, since it uses less digits than its factorization.

199771738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52173.

The product of its digits is 666792, while the sum is 52.

The square root of 199771738 is about 14134.0630393387. The cubic root of 199771738 is about 584.5809822367.

The spelling of 199771738 in words is "one hundred ninety-nine million, seven hundred seventy-one thousand, seven hundred thirty-eight".