199183813 has 2 divisors, whose sum is σ = 199183814. Its totient is φ = 199183812.

The previous prime is 199183771. The next prime is 199183837. The reversal of 199183813 is 318381991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127983969 + 71199844 = 11313^2 + 8438^2 .

It is a cyclic number.

It is not a de Polignac number, because 199183813 - 2⁹ = 199183301 is a prime.

It is a super-2 number, since 2×199183813² = 79348382722437938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 199183813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199183843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99591906 + 99591907.

It is an arithmetic number, because the mean of its divisors is an integer number (99591907).

Almost surely, 2^199183813 is an apocalyptic number.

It is an amenable number.

199183813 is a deficient number, since it is larger than the sum of its proper divisors (1).

199183813 is an equidigital number, since it uses as much as digits as its factorization.

199183813 is an evil number, because the sum of its binary digits is even.

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

The square root of 199183813 is about 14113.2495549395. The cubic root of 199183813 is about 584.0069479454.

The spelling of 199183813 in words is "one hundred ninety-nine million, one hundred eighty-three thousand, eight hundred thirteen".