199782469 has 2 divisors, whose sum is σ = 199782470. Its totient is φ = 199782468.

The previous prime is 199782449. The next prime is 199782481. The reversal of 199782469 is 964287991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120340900 + 79441569 = 10970^2 + 8913^2 .

It is a cyclic number.

It is not a de Polignac number, because 199782469 - 2¹⁵ = 199749701 is a prime.

It is a super-2 number, since 2×199782469² = 79826069839471922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199782449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99891234 + 99891235.

It is an arithmetic number, because the mean of its divisors is an integer number (99891235).

Almost surely, 2^199782469 is an apocalyptic number.

It is an amenable number.

199782469 is a deficient number, since it is larger than the sum of its proper divisors (1).

199782469 is an equidigital number, since it uses as much as digits as its factorization.

199782469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 55.

The square root of 199782469 is about 14134.4426490753. The cubic root of 199782469 is about 584.5914492265.

The spelling of 199782469 in words is "one hundred ninety-nine million, seven hundred eighty-two thousand, four hundred sixty-nine".