199434239 has 6 divisors (see below), whose sum is σ = 200663664. Its totient is φ = 198212300.

The previous prime is 199434229. The next prime is 199434251. The reversal of 199434239 is 932434991.

It is a de Polignac number, because none of the positive numbers 2^k-199434239 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 199434239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199434229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24314 + ... + 31464.

It is an arithmetic number, because the mean of its divisors is an integer number (33443944).

Almost surely, 2^199434239 is an apocalyptic number.

199434239 is a deficient number, since it is larger than the sum of its proper divisors (1229425).

199434239 is an frugal number, since it uses more digits than its factorization.

199434239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7485 (or 7318 counting only the distinct ones).

The product of its digits is 209952, while the sum is 44.

The square root of 199434239 is about 14122.1187857913. The cubic root of 199434239 is about 584.2515951264.

The spelling of 199434239 in words is "one hundred ninety-nine million, four hundred thirty-four thousand, two hundred thirty-nine".