389947 has 2 divisors, whose sum is σ = 389948. Its totient is φ = 389946.

The previous prime is 389941. The next prime is 389953. The reversal of 389947 is 749983.

It is a balanced prime because it is at equal distance from previous prime (389941) and next prime (389953).

It is a cyclic number.

It is not a de Polignac number, because 389947 - 2⁷ = 389819 is a prime.

It is not a weakly prime, because it can be changed into another prime (389941) 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, 194973 + 194974.

It is an arithmetic number, because the mean of its divisors is an integer number (194974).

2³⁸⁹⁹⁴⁷ is an apocalyptic number.

389947 is a deficient number, since it is larger than the sum of its proper divisors (1).

389947 is an equidigital number, since it uses as much as digits as its factorization.

389947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 389947 is about 624.4573644373. The cubic root of 389947 is about 73.0581259701.

The spelling of 389947 in words is "three hundred eighty-nine thousand, nine hundred forty-seven".