199881313 has 4 divisors (see below), whose sum is σ = 199944448. Its totient is φ = 199818180.

The previous prime is 199881307. The next prime is 199881337. The reversal of 199881313 is 313188991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 313188991 = 3329 ⋅94079.

It is a cyclic number.

It is not a de Polignac number, because 199881313 - 2²¹ = 197784161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 199881313.

It is not an unprimeable number, because it can be changed into a prime (199881113) 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, 26553 + ... + 33238.

It is an arithmetic number, because the mean of its divisors is an integer number (49986112).

Almost surely, 2^199881313 is an apocalyptic number.

It is an amenable number.

199881313 is a deficient number, since it is larger than the sum of its proper divisors (63135).

199881313 is an equidigital number, since it uses as much as digits as its factorization.

199881313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63134.

The product of its digits is 46656, while the sum is 43.

The square root of 199881313 is about 14137.9387818734. The cubic root of 199881313 is about 584.6878437875.

The spelling of 199881313 in words is "one hundred ninety-nine million, eight hundred eighty-one thousand, three hundred thirteen".