388942957841 has 2 divisors, whose sum is σ = 388942957842. Its totient is φ = 388942957840.

The previous prime is 388942957817. The next prime is 388942957861. The reversal of 388942957841 is 148759249883.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201385537600 + 187557420241 = 448760^2 + 433079^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-388942957841 is a prime.

It is a super-3 number, since 3×388942957841³ (a number of 36 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (388942957861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194471478920 + 194471478921.

It is an arithmetic number, because the mean of its divisors is an integer number (194471478921).

Almost surely, 2^388942957841 is an apocalyptic number.

It is an amenable number.

388942957841 is a deficient number, since it is larger than the sum of its proper divisors (1).

388942957841 is an equidigital number, since it uses as much as digits as its factorization.

388942957841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139345920, while the sum is 68.

The spelling of 388942957841 in words is "three hundred eighty-eight billion, nine hundred forty-two million, nine hundred fifty-seven thousand, eight hundred forty-one".