199493473 has 2 divisors, whose sum is σ = 199493474. Its totient is φ = 199493472.

The previous prime is 199493471. The next prime is 199493479. The reversal of 199493473 is 374394991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165714129 + 33779344 = 12873^2 + 5812^2 .

It is an emirp because it is prime and its reverse (374394991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199493473 - 2¹ = 199493471 is a prime.

Together with 199493471, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (199493471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99746736 + 99746737.

It is an arithmetic number, because the mean of its divisors is an integer number (99746737).

Almost surely, 2^199493473 is an apocalyptic number.

It is an amenable number.

199493473 is a deficient number, since it is larger than the sum of its proper divisors (1).

199493473 is an equidigital number, since it uses as much as digits as its factorization.

199493473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 49.

The square root of 199493473 is about 14124.2158366403. The cubic root of 199493473 is about 584.3094322919.

The spelling of 199493473 in words is "one hundred ninety-nine million, four hundred ninety-three thousand, four hundred seventy-three".