389309944257757 has 2 divisors, whose sum is σ = 389309944257758. Its totient is φ = 389309944257756.

The previous prime is 389309944257749. The next prime is 389309944257791. The reversal of 389309944257757 is 757752449903983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 356428195041636 + 32881749216121 = 18879306^2 + 5734261^2 .

It is a cyclic number.

It is not a de Polignac number, because 389309944257757 - 2³ = 389309944257749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389309944257257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194654972128878 + 194654972128879.

It is an arithmetic number, because the mean of its divisors is an integer number (194654972128879).

Almost surely, 2^{389309944257757} is an apocalyptic number.

It is an amenable number.

389309944257757 is a deficient number, since it is larger than the sum of its proper divisors (1).

389309944257757 is an equidigital number, since it uses as much as digits as its factorization.

389309944257757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14402707200, while the sum is 82.

The spelling of 389309944257757 in words is "three hundred eighty-nine trillion, three hundred nine billion, nine hundred forty-four million, two hundred fifty-seven thousand, seven hundred fifty-seven".