389381 has 2 divisors, whose sum is σ = 389382. Its totient is φ = 389380.

The previous prime is 389369. The next prime is 389399. The reversal of 389381 is 183983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217156 + 172225 = 466^2 + 415^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389381 is a prime.

It is a super-2 number, since 2×389381² = 303235126322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194690 + 194691.

It is an arithmetic number, because the mean of its divisors is an integer number (194691).

2³⁸⁹³⁸¹ is an apocalyptic number.

It is an amenable number.

389381 is a deficient number, since it is larger than the sum of its proper divisors (1).

389381 is an equidigital number, since it uses as much as digits as its factorization.

389381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 389381 is about 624.0040063974. The cubic root of 389381 is about 73.0227614017.

The spelling of 389381 in words is "three hundred eighty-nine thousand, three hundred eighty-one".