199993273 has 2 divisors, whose sum is σ = 199993274. Its totient is φ = 199993272.

The previous prime is 199993271. The next prime is 199993279. The reversal of 199993273 is 372399991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135303424 + 64689849 = 11632^2 + 8043^2 .

It is a cyclic number.

It is not a de Polignac number, because 199993273 - 2¹ = 199993271 is a prime.

Together with 199993271, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 199993273.

It is not a weakly prime, because it can be changed into another prime (199993271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99996636 + 99996637.

It is an arithmetic number, because the mean of its divisors is an integer number (99996637).

Almost surely, 2^199993273 is an apocalyptic number.

It is an amenable number.

199993273 is a deficient number, since it is larger than the sum of its proper divisors (1).

199993273 is an equidigital number, since it uses as much as digits as its factorization.

199993273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 826686, while the sum is 52.

The square root of 199993273 is about 14141.8977863652. The cubic root of 199993273 is about 584.7969909466.

The spelling of 199993273 in words is "one hundred ninety-nine million, nine hundred ninety-three thousand, two hundred seventy-three".