199224797 has 2 divisors, whose sum is σ = 199224798. Its totient is φ = 199224796.

The previous prime is 199224787. The next prime is 199224799. The reversal of 199224797 is 797422991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191711716 + 7513081 = 13846^2 + 2741^2 .

It is an emirp because it is prime and its reverse (797422991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199224797 - 2¹² = 199220701 is a prime.

Together with 199224799, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199224799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99612398 + 99612399.

It is an arithmetic number, because the mean of its divisors is an integer number (99612399).

Almost surely, 2^199224797 is an apocalyptic number.

It is an amenable number.

199224797 is a deficient number, since it is larger than the sum of its proper divisors (1).

199224797 is an equidigital number, since it uses as much as digits as its factorization.

199224797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 50.

The square root of 199224797 is about 14114.7014491983. The cubic root of 199224797 is about 584.0470002284.

The spelling of 199224797 in words is "one hundred ninety-nine million, two hundred twenty-four thousand, seven hundred ninety-seven".