389024325821 has 2 divisors, whose sum is σ = 389024325822. Its totient is φ = 389024325820.

The previous prime is 389024325787. The next prime is 389024325869. The reversal of 389024325821 is 128523420983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233641723225 + 155382602596 = 483365^2 + 394186^2 .

It is an emirp because it is prime and its reverse (128523420983) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389024325821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389024325871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194512162910 + 194512162911.

It is an arithmetic number, because the mean of its divisors is an integer number (194512162911).

Almost surely, 2^389024325821 is an apocalyptic number.

It is an amenable number.

389024325821 is a deficient number, since it is larger than the sum of its proper divisors (1).

389024325821 is an equidigital number, since it uses as much as digits as its factorization.

389024325821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 389024325821 in words is "three hundred eighty-nine billion, twenty-four million, three hundred twenty-five thousand, eight hundred twenty-one".