199489197 has 16 divisors (see below), whose sum is σ = 275484672. Its totient is φ = 128323440.

The previous prime is 199489181. The next prime is 199489211. The reversal of 199489197 is 791984991.

It is not a de Polignac number, because 199489197 - 2⁴ = 199489181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199489117) 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 15 ways as a sum of consecutive naturals, for example, 48 + ... + 19974.

It is an arithmetic number, because the mean of its divisors is an integer number (17217792).

Almost surely, 2^199489197 is an apocalyptic number.

It is an amenable number.

199489197 is a deficient number, since it is larger than the sum of its proper divisors (75995475).

199489197 is a wasteful number, since it uses less digits than its factorization.

199489197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20048.

The product of its digits is 1469664, while the sum is 57.

The square root of 199489197 is about 14124.0644645938. The cubic root of 199489197 is about 584.3052575104.

The spelling of 199489197 in words is "one hundred ninety-nine million, four hundred eighty-nine thousand, one hundred ninety-seven".