193368689 has 4 divisors (see below), whose sum is σ = 193494756. Its totient is φ = 193242624.

The previous prime is 193368683. The next prime is 193368691. The reversal of 193368689 is 986863391.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 986863391 = 353 ⋅2795647.

It can be written as a sum of positive squares in 2 ways, for example, as 5678689 + 187690000 = 2383^2 + 13700^2 .

It is a cyclic number.

It is not a de Polignac number, because 193368689 - 2²⁰ = 192320113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 193368689.

It is not an unprimeable number, because it can be changed into a prime (193368683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60704 + ... + 63809.

It is an arithmetic number, because the mean of its divisors is an integer number (48373689).

Almost surely, 2^193368689 is an apocalyptic number.

It is an amenable number.

193368689 is a deficient number, since it is larger than the sum of its proper divisors (126067).

193368689 is a wasteful number, since it uses less digits than its factorization.

193368689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126066.

The product of its digits is 1679616, while the sum is 53.

The square root of 193368689 is about 13905.7070658058. The cubic root of 193368689 is about 578.2674107760.

The spelling of 193368689 in words is "one hundred ninety-three million, three hundred sixty-eight thousand, six hundred eighty-nine".