199419139 has 2 divisors, whose sum is σ = 199419140. Its totient is φ = 199419138.

The previous prime is 199419133. The next prime is 199419161. The reversal of 199419139 is 931914991.

199419139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199419139 - 2⁵ = 199419107 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (199419133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99709569 + 99709570.

It is an arithmetic number, because the mean of its divisors is an integer number (99709570).

Almost surely, 2^199419139 is an apocalyptic number.

199419139 is a deficient number, since it is larger than the sum of its proper divisors (1).

199419139 is an equidigital number, since it uses as much as digits as its factorization.

199419139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78732, while the sum is 46.

The square root of 199419139 is about 14121.5841533448. The cubic root of 199419139 is about 584.2368493773.

The spelling of 199419139 in words is "one hundred ninety-nine million, four hundred nineteen thousand, one hundred thirty-nine".