389123213 has 2 divisors, whose sum is σ = 389123214. Its totient is φ = 389123212.

The previous prime is 389123201. The next prime is 389123243. The reversal of 389123213 is 312321983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284327044 + 104796169 = 16862^2 + 10237^2 .

It is an emirp because it is prime and its reverse (312321983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 389123213 - 2¹⁰ = 389122189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 389123213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389123243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194561606 + 194561607.

It is an arithmetic number, because the mean of its divisors is an integer number (194561607).

Almost surely, 2^389123213 is an apocalyptic number.

It is an amenable number.

389123213 is a deficient number, since it is larger than the sum of its proper divisors (1).

389123213 is an equidigital number, since it uses as much as digits as its factorization.

389123213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The square root of 389123213 is about 19726.2062495554. The cubic root of 389123213 is about 730.0664310596.

The spelling of 389123213 in words is "three hundred eighty-nine million, one hundred twenty-three thousand, two hundred thirteen".