199804469 has 2 divisors, whose sum is σ = 199804470. Its totient is φ = 199804468.

The previous prime is 199804457. The next prime is 199804529. The reversal of 199804469 is 964408991.

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., 197065444 + 2739025 = 14038^2 + 1655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199804469 is a prime.

It is a super-2 number, since 2×199804469² = 79843651664743922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199804069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99902234 + 99902235.

It is an arithmetic number, because the mean of its divisors is an integer number (99902235).

Almost surely, 2^199804469 is an apocalyptic number.

It is an amenable number.

199804469 is a deficient number, since it is larger than the sum of its proper divisors (1).

199804469 is an equidigital number, since it uses as much as digits as its factorization.

199804469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 199804469 is about 14135.2208684548. The cubic root of 199804469 is about 584.6129067980.

The spelling of 199804469 in words is "one hundred ninety-nine million, eight hundred four thousand, four hundred sixty-nine".