199975313 has 2 divisors, whose sum is σ = 199975314. Its totient is φ = 199975312.

The previous prime is 199975289. The next prime is 199975331. The reversal of 199975313 is 313579991.

Together with next prime (199975331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138697729 + 61277584 = 11777^2 + 7828^2 .

It is an emirp because it is prime and its reverse (313579991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199975313 - 2¹² = 199971217 is a prime.

It is not a weakly prime, because it can be changed into another prime (199975333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99987656 + 99987657.

It is an arithmetic number, because the mean of its divisors is an integer number (99987657).

Almost surely, 2^199975313 is an apocalyptic number.

It is an amenable number.

199975313 is a deficient number, since it is larger than the sum of its proper divisors (1).

199975313 is an equidigital number, since it uses as much as digits as its factorization.

199975313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 229635, while the sum is 47.

The square root of 199975313 is about 14141.2627795399. The cubic root of 199975313 is about 584.7794849105.

The spelling of 199975313 in words is "one hundred ninety-nine million, nine hundred seventy-five thousand, three hundred thirteen".