388004389 has 2 divisors, whose sum is σ = 388004390. Its totient is φ = 388004388.

The previous prime is 388004387. The next prime is 388004423. The reversal of 388004389 is 983400883.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 360620100 + 27384289 = 18990^2 + 5233^2 .

It is a cyclic number.

It is not a de Polignac number, because 388004389 - 2¹ = 388004387 is a prime.

Together with 388004387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388004387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194002194 + 194002195.

It is an arithmetic number, because the mean of its divisors is an integer number (194002195).

Almost surely, 2^388004389 is an apocalyptic number.

It is an amenable number.

388004389 is a deficient number, since it is larger than the sum of its proper divisors (1).

388004389 is an equidigital number, since it uses as much as digits as its factorization.

388004389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 388004389 is about 19697.8270121351. The cubic root of 388004389 is about 729.3660531173.

The spelling of 388004389 in words is "three hundred eighty-eight million, four thousand, three hundred eighty-nine".