199939039 has 2 divisors, whose sum is σ = 199939040. Its totient is φ = 199939038.

The previous prime is 199939037. The next prime is 199939063. The reversal of 199939039 is 930939991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199939039 - 2¹ = 199939037 is a prime.

Together with 199939037, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199939037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99969519 + 99969520.

It is an arithmetic number, because the mean of its divisors is an integer number (99969520).

Almost surely, 2^199939039 is an apocalyptic number.

199939039 is a deficient number, since it is larger than the sum of its proper divisors (1).

199939039 is an equidigital number, since it uses as much as digits as its factorization.

199939039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 531441, while the sum is 52.

The square root of 199939039 is about 14139.9801626452. The cubic root of 199939039 is about 584.7441245896.

The spelling of 199939039 in words is "one hundred ninety-nine million, nine hundred thirty-nine thousand, thirty-nine".