194175066409 has 3 divisors (see below), whose sum is σ = 194175507063. Its totient is φ = 194174625756.

The previous prime is 194175066401. The next prime is 194175066419. The reversal of 194175066409 is 904660571491.

The square root of 194175066409 is 440653.

It is a perfect power (a square), and thus also a powerful number.

194175066409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 119442816025 + 74732250384 = 345605^2 + 273372^2 .

It is not a de Polignac number, because 194175066409 - 2³ = 194175066401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194175066401) 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 in 2 ways as a sum of consecutive naturals, for example, 220327 + ... + 660979.

It is an arithmetic number, because the mean of its divisors is an integer number (64725169021).

Almost surely, 2^194175066409 is an apocalyptic number.

194175066409 is the 440653-rd square number.

194175066409 is the 220327-th centered octagonal number.

It is an amenable number.

194175066409 is a deficient number, since it is larger than the sum of its proper divisors (440654).

194175066409 is an frugal number, since it uses more digits than its factorization.

194175066409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881306 (or 440653 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 194175066409 in words is "one hundred ninety-four billion, one hundred seventy-five million, sixty-six thousand, four hundred nine".