199126139 has 2 divisors, whose sum is σ = 199126140. Its totient is φ = 199126138.

The previous prime is 199126129. The next prime is 199126177. The reversal of 199126139 is 931621991.

It is a weak prime.

It is an emirp because it is prime and its reverse (931621991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199126139 - 2²⁰ = 198077563 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 199126096 and 199126105.

It is not a weakly prime, because it can be changed into another prime (199126129) 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 as a sum of consecutive naturals, namely, 99563069 + 99563070.

It is an arithmetic number, because the mean of its divisors is an integer number (99563070).

Almost surely, 2^199126139 is an apocalyptic number.

199126139 is a deficient number, since it is larger than the sum of its proper divisors (1).

199126139 is an equidigital number, since it uses as much as digits as its factorization.

199126139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 41.

The square root of 199126139 is about 14111.2061497237. The cubic root of 199126139 is about 583.9505757807.

The spelling of 199126139 in words is "one hundred ninety-nine million, one hundred twenty-six thousand, one hundred thirty-nine".