193394706689 has 4 divisors (see below), whose sum is σ = 204770865924. Its totient is φ = 182018547456.

The previous prime is 193394706683. The next prime is 193394706691. The reversal of 193394706689 is 986607493391.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67381776400 + 126012930289 = 259580^2 + 354983^2 .

It is a cyclic number.

It is not a de Polignac number, because 193394706689 - 2¹² = 193394702593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (193394706683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5688079592 + ... + 5688079625.

It is an arithmetic number, because the mean of its divisors is an integer number (51192716481).

Almost surely, 2^193394706689 is an apocalyptic number.

It is an amenable number.

193394706689 is a deficient number, since it is larger than the sum of its proper divisors (11376159235).

193394706689 is a wasteful number, since it uses less digits than its factorization.

193394706689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11376159234.

The product of its (nonzero) digits is 52907904, while the sum is 65.

The spelling of 193394706689 in words is "one hundred ninety-three billion, three hundred ninety-four million, seven hundred six thousand, six hundred eighty-nine".