199999361 has 2 divisors, whose sum is σ = 199999362.
Its totient is φ = 199999360.
The previous prime is 199999357. The next prime is 199999391. The reversal of 199999361 is 163999991.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 132250000 + 67749361 = 11500^2 + 8231^2
It is an emirp because it is prime and its reverse (163999991) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 199999361 - 22 = 199999357 is a prime.
It is a Chen prime.
It is a junction number, because it is equal to n+sod(n) for n = 199999297 and 199999306.
It is not a weakly prime, because it can be changed into another prime (199999391) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99999680 + 99999681.
It is an arithmetic number, because the mean of its divisors is an integer number (99999681).
Almost surely, 2199999361 is an apocalyptic number.
It is an amenable number.
199999361 is a deficient number, since it is larger than the sum of its proper divisors (1).
199999361 is an equidigital number, since it uses as much as digits as its factorization.
199999361 is an evil number, because the sum of its binary digits is even.
The product of its digits is 1062882, while the sum is 56.
The square root of 199999361 is about 14142.1130316512.
The cubic root of 199999361 is about 584.8029248261.
The spelling of 199999361 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, three hundred sixty-one".