199799417 has 2 divisors, whose sum is σ = 199799418. Its totient is φ = 199799416.

The previous prime is 199799407. The next prime is 199799441. The reversal of 199799417 is 714997991.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133148521 + 66650896 = 11539^2 + 8164^2 .

It is an emirp because it is prime and its reverse (714997991) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199799417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (199799407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99899708 + 99899709.

It is an arithmetic number, because the mean of its divisors is an integer number (99899709).

Almost surely, 2^199799417 is an apocalyptic number.

It is an amenable number.

199799417 is a deficient number, since it is larger than the sum of its proper divisors (1).

199799417 is an equidigital number, since it uses as much as digits as its factorization.

199799417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1285956, while the sum is 56.

The square root of 199799417 is about 14135.0421647762. The cubic root of 199799417 is about 584.6079794986.

The spelling of 199799417 in words is "one hundred ninety-nine million, seven hundred ninety-nine thousand, four hundred seventeen".