199999349 has 12 divisors (see below), whose sum is σ = 220260768. Its totient is φ = 180093000.

The previous prime is 199999343. The next prime is 199999357. The reversal of 199999349 is 943999991.

It is not a de Polignac number, because 199999349 - 2⁴ = 199999333 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 199999291 and 199999300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199999343) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 576194 + ... + 576540.

It is an arithmetic number, because the mean of its divisors is an integer number (18355064).

Almost surely, 2^199999349 is an apocalyptic number.

It is an amenable number.

199999349 is a deficient number, since it is larger than the sum of its proper divisors (20261419).

199999349 is an equidigital number, since it uses as much as digits as its factorization.

199999349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856 (or 509 counting only the distinct ones).

The product of its digits is 6377292, while the sum is 62.

The square root of 199999349 is about 14142.1126073865. The cubic root of 199999349 is about 584.8029131300.

The spelling of 199999349 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, three hundred forty-nine".