199991303 has 2 divisors, whose sum is σ = 199991304. Its totient is φ = 199991302.

The previous prime is 199991299. The next prime is 199991339. The reversal of 199991303 is 303199991.

199991303 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 199991303 - 2² = 199991299 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199991203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99995651 + 99995652.

It is an arithmetic number, because the mean of its divisors is an integer number (99995652).

Almost surely, 2^199991303 is an apocalyptic number.

199991303 is a deficient number, since it is larger than the sum of its proper divisors (1).

199991303 is an equidigital number, since it uses as much as digits as its factorization.

199991303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 59049, while the sum is 44.

The square root of 199991303 is about 14141.8281350043. The cubic root of 199991303 is about 584.7950707923.

The spelling of 199991303 in words is "one hundred ninety-nine million, nine hundred ninety-one thousand, three hundred three".