199389111 has 16 divisors (see below), whose sum is σ = 268800000. Its totient is φ = 131459328.

The previous prime is 199389101. The next prime is 199389121. The reversal of 199389111 is 111983991.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (199389101) and next prime (199389121).

It is not a de Polignac number, because 199389111 - 2⁵ = 199389079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199389101) 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, 159015 + ... + 160263.

It is an arithmetic number, because the mean of its divisors is an integer number (16800000).

Almost surely, 2^199389111 is an apocalyptic number.

199389111 is a deficient number, since it is larger than the sum of its proper divisors (69410889).

199389111 is a wasteful number, since it uses less digits than its factorization.

199389111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798.

The product of its digits is 17496, while the sum is 42.

The square root of 199389111 is about 14120.5209181531. The cubic root of 199389111 is about 584.2075236318.

The spelling of 199389111 in words is "one hundred ninety-nine million, three hundred eighty-nine thousand, one hundred eleven".