199784461 has 2 divisors, whose sum is σ = 199784462.
Its totient is φ = 199784460.
The previous prime is 199784399. The next prime is 199784467. The reversal of 199784461 is 164487991.
199784461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 179399236 + 20385225 = 13394^2 + 4515^2
It is a cyclic number.
It is not a de Polignac number, because 199784461 - 227 = 65566733 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (199784467) by changing a digit.
It is a good prime.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99892230 + 99892231.
It is an arithmetic number, because the mean of its divisors is an integer number (99892231).
Almost surely, 2199784461 is an apocalyptic number.
It is an amenable number.
199784461 is a deficient number, since it is larger than the sum of its proper divisors (1).
199784461 is an equidigital number, since it uses as much as digits as its factorization.
199784461 is an evil number, because the sum of its binary digits is even.
The product of its digits is 435456, while the sum is 49.
The square root of 199784461 is about 14134.5131150670.
The cubic root of 199784461 is about 584.5933921769.
The spelling of 199784461 in words is "one hundred ninety-nine million, seven hundred eighty-four thousand, four hundred sixty-one".