199782479 has 8 divisors (see below), whose sum is σ = 222569760. Its totient is φ = 178055136.

The previous prime is 199782469. The next prime is 199782481. The reversal of 199782479 is 974287991.

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

It is a cyclic number.

It is not a de Polignac number, because 199782479 - 2¹⁶ = 199716943 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 (199782449) 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, 264587 + ... + 265340.

It is an arithmetic number, because the mean of its divisors is an integer number (27821220).

Almost surely, 2^199782479 is an apocalyptic number.

199782479 is a deficient number, since it is larger than the sum of its proper divisors (22787281).

199782479 is a wasteful number, since it uses less digits than its factorization.

199782479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529969.

The product of its digits is 2286144, while the sum is 56.

The square root of 199782479 is about 14134.4430028212. The cubic root of 199782479 is about 584.5914589803.

The spelling of 199782479 in words is "one hundred ninety-nine million, seven hundred eighty-two thousand, four hundred seventy-nine".