199775889 has 18 divisors (see below), whose sum is σ = 299658450. Its totient is φ = 133179552.

The previous prime is 199775837. The next prime is 199775941. The reversal of 199775889 is 988577991.

199775889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (199775837) and next prime (199775941).

It can be written as a sum of positive squares in only one way, i.e., 134165889 + 65610000 = 11583^2 + 8100^2 .

It is not a de Polignac number, because 199775889 - 2¹⁵ = 199743121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199775819) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8664 + ... + 21785.

Almost surely, 2^199775889 is an apocalyptic number.

It is an amenable number.

199775889 is a deficient number, since it is larger than the sum of its proper divisors (99882561).

199775889 is an frugal number, since it uses more digits than its factorization.

199775889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30473 (or 30452 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 63.

The square root of 199775889 is about 14134.2098824094. The cubic root of 199775889 is about 584.5850311559.

The spelling of 199775889 in words is "one hundred ninety-nine million, seven hundred seventy-five thousand, eight hundred eighty-nine".