3968346689 has 4 divisors (see below), whose sum is σ = 4105186260. Its totient is φ = 3831507120.

The previous prime is 3968346659. The next prime is 3968346721. The reversal of 3968346689 is 9866438693.

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 2004084289 + 1964262400 = 44767^2 + 44320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3968346689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3968346659) 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, 68419742 + ... + 68419799.

It is an arithmetic number, because the mean of its divisors is an integer number (1026296565).

Almost surely, 2^3968346689 is an apocalyptic number.

It is an amenable number.

3968346689 is a deficient number, since it is larger than the sum of its proper divisors (136839571).

3968346689 is a wasteful number, since it uses less digits than its factorization.

3968346689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136839570.

The product of its digits is 40310784, while the sum is 62.

The square root of 3968346689 is about 62994.8147786784. The cubic root of 3968346689 is about 1583.2027499718.

The spelling of 3968346689 in words is "three billion, nine hundred sixty-eight million, three hundred forty-six thousand, six hundred eighty-nine".