199224749 has 2 divisors, whose sum is σ = 199224750. Its totient is φ = 199224748.

The previous prime is 199224743. The next prime is 199224787. The reversal of 199224749 is 947422991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177369124 + 21855625 = 13318^2 + 4675^2 .

It is an emirp because it is prime and its reverse (947422991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199224749 - 2¹² = 199220653 is a prime.

It is a super-2 number, since 2×199224749² = 79381001228226002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199224743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99612374 + 99612375.

It is an arithmetic number, because the mean of its divisors is an integer number (99612375).

Almost surely, 2^199224749 is an apocalyptic number.

It is an amenable number.

199224749 is a deficient number, since it is larger than the sum of its proper divisors (1).

199224749 is an equidigital number, since it uses as much as digits as its factorization.

199224749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 47.

The square root of 199224749 is about 14114.6997488434. The cubic root of 199224749 is about 584.0469533228.

The spelling of 199224749 in words is "one hundred ninety-nine million, two hundred twenty-four thousand, seven hundred forty-nine".