199696439 has 4 divisors (see below), whose sum is σ = 200347224. Its totient is φ = 199045656.

The previous prime is 199696379. The next prime is 199696447. The reversal of 199696439 is 934696991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 199696439 - 2¹⁶ = 199630903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199696459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324932 + ... + 325545.

It is an arithmetic number, because the mean of its divisors is an integer number (50086806).

Almost surely, 2^199696439 is an apocalyptic number.

199696439 is a deficient number, since it is larger than the sum of its proper divisors (650785).

199696439 is an equidigital number, since it uses as much as digits as its factorization.

199696439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650784.

The product of its digits is 2834352, while the sum is 56.

The square root of 199696439 is about 14131.3990460959. The cubic root of 199696439 is about 584.5075252410.

The spelling of 199696439 in words is "one hundred ninety-nine million, six hundred ninety-six thousand, four hundred thirty-nine".