199193669 has 2 divisors, whose sum is σ = 199193670. Its totient is φ = 199193668.

The previous prime is 199193653. The next prime is 199193677. The reversal of 199193669 is 966391991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199176769 + 16900 = 14113^2 + 130^2 .

It is a cyclic number.

It is not a de Polignac number, because 199193669 - 2⁴ = 199193653 is a prime.

It is a super-2 number, since 2×199193669² = 79356235539363122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 199193669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199193699) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99596834 + 99596835.

It is an arithmetic number, because the mean of its divisors is an integer number (99596835).

Almost surely, 2^199193669 is an apocalyptic number.

It is an amenable number.

199193669 is a deficient number, since it is larger than the sum of its proper divisors (1).

199193669 is an equidigital number, since it uses as much as digits as its factorization.

199193669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 708588, while the sum is 53.

The square root of 199193669 is about 14113.5987260514. The cubic root of 199193669 is about 584.0165803840.

The spelling of 199193669 in words is "one hundred ninety-nine million, one hundred ninety-three thousand, six hundred sixty-nine".