199130813 has 4 divisors (see below), whose sum is σ = 227578080. Its totient is φ = 170683548.

The previous prime is 199130801. The next prime is 199130819. The reversal of 199130813 is 318031991.

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.

It is not a de Polignac number, because 199130813 - 2¹² = 199126717 is a prime.

It is a super-3 number, since 3×199130813³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199130819) 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, 14223623 + ... + 14223636.

It is an arithmetic number, because the mean of its divisors is an integer number (56894520).

Almost surely, 2^199130813 is an apocalyptic number.

It is an amenable number.

199130813 is a deficient number, since it is larger than the sum of its proper divisors (28447267).

199130813 is an equidigital number, since it uses as much as digits as its factorization.

199130813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28447266.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 199130813 is about 14111.3717618097. The cubic root of 199130813 is about 583.9551446831.

The spelling of 199130813 in words is "one hundred ninety-nine million, one hundred thirty thousand, eight hundred thirteen".