199968469 has 2 divisors, whose sum is σ = 199968470. Its totient is φ = 199968468.

The previous prime is 199968443. The next prime is 199968479. The reversal of 199968469 is 964869991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140138244 + 59830225 = 11838^2 + 7735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199968469 is a prime.

It is a super-2 number, since 2×199968469² = 79974777188407922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199968479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99984234 + 99984235.

It is an arithmetic number, because the mean of its divisors is an integer number (99984235).

Almost surely, 2^199968469 is an apocalyptic number.

It is an amenable number.

199968469 is a deficient number, since it is larger than the sum of its proper divisors (1).

199968469 is an equidigital number, since it uses as much as digits as its factorization.

199968469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7558272, while the sum is 61.

The square root of 199968469 is about 14141.0207905936. The cubic root of 199968469 is about 584.7728136263.

The spelling of 199968469 in words is "one hundred ninety-nine million, nine hundred sixty-eight thousand, four hundred sixty-nine".