199799439 has 8 divisors (see below), whose sum is σ = 304456320. Its totient is φ = 114171096.

The previous prime is 199799417. The next prime is 199799441. The reversal of 199799439 is 934997991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 199799439 - 2⁵ = 199799407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199799449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4757109 + ... + 4757150.

It is an arithmetic number, because the mean of its divisors is an integer number (38057040).

Almost surely, 2^199799439 is an apocalyptic number.

199799439 is a deficient number, since it is larger than the sum of its proper divisors (104656881).

199799439 is an equidigital number, since it uses as much as digits as its factorization.

199799439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9514269.

The product of its digits is 4960116, while the sum is 60.

The square root of 199799439 is about 14135.0429429839. The cubic root of 199799439 is about 584.6080009557.

The spelling of 199799439 in words is "one hundred ninety-nine million, seven hundred ninety-nine thousand, four hundred thirty-nine".