199828479 has 4 divisors (see below), whose sum is σ = 266437976. Its totient is φ = 133218984.

The previous prime is 199828477. The next prime is 199828483. The reversal of 199828479 is 974828991.

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

It is not a de Polignac number, because 199828479 - 2¹ = 199828477 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 (199828471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33304744 + ... + 33304749.

It is an arithmetic number, because the mean of its divisors is an integer number (66609494).

Almost surely, 2^199828479 is an apocalyptic number.

199828479 is a deficient number, since it is larger than the sum of its proper divisors (66609497).

199828479 is an equidigital number, since it uses as much as digits as its factorization.

199828479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66609496.

The product of its digits is 2612736, while the sum is 57.

The square root of 199828479 is about 14136.0701398939. The cubic root of 199828479 is about 584.6363230137.

The spelling of 199828479 in words is "one hundred ninety-nine million, eight hundred twenty-eight thousand, four hundred seventy-nine".