199520289 has 12 divisors (see below), whose sum is σ = 291435300. Its totient is φ = 131518464.

The previous prime is 199520281. The next prime is 199520291. The reversal of 199520289 is 982025991.

It can be written as a sum of positive squares in 2 ways, for example, as 19289664 + 180230625 = 4392^2 + 13425^2 .

It is not a de Polignac number, because 199520289 - 2³ = 199520281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199520281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123744 + ... + 125345.

It is an arithmetic number, because the mean of its divisors is an integer number (24286275).

Almost surely, 2^199520289 is an apocalyptic number.

It is an amenable number.

199520289 is a deficient number, since it is larger than the sum of its proper divisors (91915011).

199520289 is a wasteful number, since it uses less digits than its factorization.

199520289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249184 (or 249181 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 199520289 is about 14125.1650963803. The cubic root of 199520289 is about 584.3356121622.

It can be divided in two parts, 199520 and 289, that added together give a square (199809 = 447²).

The spelling of 199520289 in words is "one hundred ninety-nine million, five hundred twenty thousand, two hundred eighty-nine".