199116493 has 2 divisors, whose sum is σ = 199116494. Its totient is φ = 199116492.

The previous prime is 199116481. The next prime is 199116517. The reversal of 199116493 is 394611991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172055689 + 27060804 = 13117^2 + 5202^2 .

It is an emirp because it is prime and its reverse (394611991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199116493 - 2¹⁷ = 198985421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199116403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99558246 + 99558247.

It is an arithmetic number, because the mean of its divisors is an integer number (99558247).

Almost surely, 2^199116493 is an apocalyptic number.

It is an amenable number.

199116493 is a deficient number, since it is larger than the sum of its proper divisors (1).

199116493 is an equidigital number, since it uses as much as digits as its factorization.

199116493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52488, while the sum is 43.

The square root of 199116493 is about 14110.8643604848. The cubic root of 199116493 is about 583.9411464508.

The spelling of 199116493 in words is "one hundred ninety-nine million, one hundred sixteen thousand, four hundred ninety-three".