199000391 has 2 divisors, whose sum is σ = 199000392. Its totient is φ = 199000390.

The previous prime is 199000387. The next prime is 199000411. The reversal of 199000391 is 193000991.

199000391 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 199000391 - 2² = 199000387 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199000591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99500195 + 99500196.

It is an arithmetic number, because the mean of its divisors is an integer number (99500196).

Almost surely, 2^199000391 is an apocalyptic number.

199000391 is a deficient number, since it is larger than the sum of its proper divisors (1).

199000391 is an equidigital number, since it uses as much as digits as its factorization.

199000391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2187, while the sum is 32.

The square root of 199000391 is about 14106.7498382866. The cubic root of 199000391 is about 583.8276284538.

The spelling of 199000391 in words is "one hundred ninety-nine million, three hundred ninety-one", and thus it is an aban number.