389668966693 has 2 divisors, whose sum is σ = 389668966694. Its totient is φ = 389668966692.

The previous prime is 389668966669. The next prime is 389668966703. The reversal of 389668966693 is 396669866983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 224265703489 + 165403263204 = 473567^2 + 406698^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389668966693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389668969693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194834483346 + 194834483347.

It is an arithmetic number, because the mean of its divisors is an integer number (194834483347).

Almost surely, 2^389668966693 is an apocalyptic number.

It is an amenable number.

389668966693 is a deficient number, since it is larger than the sum of its proper divisors (1).

389668966693 is an equidigital number, since it uses as much as digits as its factorization.

389668966693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265173504, while the sum is 79.

The spelling of 389668966693 in words is "three hundred eighty-nine billion, six hundred sixty-eight million, nine hundred sixty-six thousand, six hundred ninety-three".