199877097 has 16 divisors (see below), whose sum is σ = 304883072. Its totient is φ = 114099840.

The previous prime is 199877089. The next prime is 199877099. The reversal of 199877097 is 790778991.

It is not a de Polignac number, because 199877097 - 2³ = 199877089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199877099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19197 + ... + 27717.

It is an arithmetic number, because the mean of its divisors is an integer number (19055192).

Almost surely, 2^199877097 is an apocalyptic number.

It is an amenable number.

199877097 is a deficient number, since it is larger than the sum of its proper divisors (105005975).

199877097 is a wasteful number, since it uses less digits than its factorization.

199877097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9648.

The product of its (nonzero) digits is 2000376, while the sum is 57.

The square root of 199877097 is about 14137.7896787298. The cubic root of 199877097 is about 584.6837329125.

The spelling of 199877097 in words is "one hundred ninety-nine million, eight hundred seventy-seven thousand, ninety-seven".