199881113 has 2 divisors, whose sum is σ = 199881114. Its totient is φ = 199881112.

The previous prime is 199881091. The next prime is 199881119. The reversal of 199881113 is 311188991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138603529 + 61277584 = 11773^2 + 7828^2 .

It is a cyclic number.

It is not a de Polignac number, because 199881113 - 2²⁶ = 132772249 is a prime.

It is not a weakly prime, because it can be changed into another prime (199881119) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99940556 + 99940557.

It is an arithmetic number, because the mean of its divisors is an integer number (99940557).

Almost surely, 2^199881113 is an apocalyptic number.

It is an amenable number.

199881113 is a deficient number, since it is larger than the sum of its proper divisors (1).

199881113 is an equidigital number, since it uses as much as digits as its factorization.

199881113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 41.

The square root of 199881113 is about 14137.9317087048. The cubic root of 199881113 is about 584.6876487758.

The spelling of 199881113 in words is "one hundred ninety-nine million, eight hundred eighty-one thousand, one hundred thirteen".