199174948409 has 2 divisors, whose sum is σ = 199174948410. Its totient is φ = 199174948408.

The previous prime is 199174948369. The next prime is 199174948417. The reversal of 199174948409 is 904849471991.

It is a happy number.

199174948409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102481936384 + 96693012025 = 320128^2 + 310955^2 .

It is a cyclic number.

It is not a de Polignac number, because 199174948409 - 2¹² = 199174944313 is a prime.

It is not a weakly prime, because it can be changed into another prime (199174941409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99587474204 + 99587474205.

It is an arithmetic number, because the mean of its divisors is an integer number (99587474205).

Almost surely, 2^199174948409 is an apocalyptic number.

It is an amenable number.

199174948409 is a deficient number, since it is larger than the sum of its proper divisors (1).

199174948409 is an equidigital number, since it uses as much as digits as its factorization.

199174948409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23514624, while the sum is 65.

The spelling of 199174948409 in words is "one hundred ninety-nine billion, one hundred seventy-four million, nine hundred forty-eight thousand, four hundred nine".