388789 has 2 divisors, whose sum is σ = 388790. Its totient is φ = 388788.

The previous prime is 388781. The next prime is 388793. The reversal of 388789 is 987883.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 380689 + 8100 = 617^2 + 90^2 .

It is a cyclic number.

It is not a de Polignac number, because 388789 - 2³ = 388781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388781) 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, 194394 + 194395.

It is an arithmetic number, because the mean of its divisors is an integer number (194395).

2³⁸⁸⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

388789 is a deficient number, since it is larger than the sum of its proper divisors (1).

388789 is an equidigital number, since it uses as much as digits as its factorization.

388789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 43.

The square root of 388789 is about 623.5294700333. The cubic root of 388789 is about 72.9857356253.

The spelling of 388789 in words is "three hundred eighty-eight thousand, seven hundred eighty-nine".