199875281 has 2 divisors, whose sum is σ = 199875282. Its totient is φ = 199875280.

The previous prime is 199875257. The next prime is 199875289. The reversal of 199875281 is 182578991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183196225 + 16679056 = 13535^2 + 4084^2 .

It is a cyclic number.

It is not a de Polignac number, because 199875281 - 2⁶ = 199875217 is a prime.

It is a super-2 number, since 2×199875281² = 79900255909657922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (199875289) 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 as a sum of consecutive naturals, namely, 99937640 + 99937641.

It is an arithmetic number, because the mean of its divisors is an integer number (99937641).

Almost surely, 2^199875281 is an apocalyptic number.

It is an amenable number.

199875281 is a deficient number, since it is larger than the sum of its proper divisors (1).

199875281 is an equidigital number, since it uses as much as digits as its factorization.

199875281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 50.

The square root of 199875281 is about 14137.7254535516. The cubic root of 199875281 is about 584.6819621763.

The spelling of 199875281 in words is "one hundred ninety-nine million, eight hundred seventy-five thousand, two hundred eighty-one".