193680689 has 2 divisors, whose sum is σ = 193680690. Its totient is φ = 193680688.

The previous prime is 193680671. The next prime is 193680701. The reversal of 193680689 is 986086391.

193680689 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., 183331600 + 10349089 = 13540^2 + 3217^2 .

It is a cyclic number.

It is not a de Polignac number, because 193680689 - 2²⁰ = 192632113 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (193680649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96840344 + 96840345.

It is an arithmetic number, because the mean of its divisors is an integer number (96840345).

Almost surely, 2^193680689 is an apocalyptic number.

It is an amenable number.

193680689 is a deficient number, since it is larger than the sum of its proper divisors (1).

193680689 is an equidigital number, since it uses as much as digits as its factorization.

193680689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 193680689 is about 13916.9209597526. The cubic root of 193680689 is about 578.5782547645.

The spelling of 193680689 in words is "one hundred ninety-three million, six hundred eighty thousand, six hundred eighty-nine".