199980813 has 8 divisors (see below), whose sum is σ = 266767488. Its totient is φ = 133257344.

The previous prime is 199980811. The next prime is 199980841. The reversal of 199980813 is 318089991.

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 199980813 - 2¹ = 199980811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199980811) 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, 7845 + ... + 21482.

It is an arithmetic number, because the mean of its divisors is an integer number (33345936).

Almost surely, 2^199980813 is an apocalyptic number.

It is an amenable number.

199980813 is a deficient number, since it is larger than the sum of its proper divisors (66786675).

199980813 is a wasteful number, since it uses less digits than its factorization.

199980813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31603.

The product of its (nonzero) digits is 139968, while the sum is 48.

The square root of 199980813 is about 14141.4572445700. The cubic root of 199980813 is about 584.7848460017.

The spelling of 199980813 in words is "one hundred ninety-nine million, nine hundred eighty thousand, eight hundred thirteen".