199768469 has 2 divisors, whose sum is σ = 199768470. Its totient is φ = 199768468.

The previous prime is 199768403. The next prime is 199768477. The reversal of 199768469 is 964867991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148474225 + 51294244 = 12185^2 + 7162^2 .

It is an emirp because it is prime and its reverse (964867991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199768469 - 2¹² = 199764373 is a prime.

It is a super-2 number, since 2×199768469² = 79814882413207922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199768969) 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, 99884234 + 99884235.

It is an arithmetic number, because the mean of its divisors is an integer number (99884235).

Almost surely, 2^199768469 is an apocalyptic number.

It is an amenable number.

199768469 is a deficient number, since it is larger than the sum of its proper divisors (1).

199768469 is an equidigital number, since it uses as much as digits as its factorization.

199768469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 59.

The square root of 199768469 is about 14133.9473962513. The cubic root of 199768469 is about 584.5777935881.

The spelling of 199768469 in words is "one hundred ninety-nine million, seven hundred sixty-eight thousand, four hundred sixty-nine".