199936423 has 4 divisors (see below), whose sum is σ = 199964880. Its totient is φ = 199907968.

The previous prime is 199936421. The next prime is 199936433. The reversal of 199936423 is 324639991.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 199936423 - 2¹ = 199936421 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 (199936421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4743 + ... + 20551.

It is an arithmetic number, because the mean of its divisors is an integer number (49991220).

Almost surely, 2^199936423 is an apocalyptic number.

199936423 is a deficient number, since it is larger than the sum of its proper divisors (28457).

199936423 is a wasteful number, since it uses less digits than its factorization.

199936423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28456.

The product of its digits is 314928, while the sum is 46.

The square root of 199936423 is about 14139.8876586768. The cubic root of 199936423 is about 584.7415743167.

The spelling of 199936423 in words is "one hundred ninety-nine million, nine hundred thirty-six thousand, four hundred twenty-three".