389791 has 2 divisors, whose sum is σ = 389792. Its totient is φ = 389790.

The previous prime is 389783. The next prime is 389797. The reversal of 389791 is 197983.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 389791 - 2³ = 389783 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 389791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389797) 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, 194895 + 194896.

It is an arithmetic number, because the mean of its divisors is an integer number (194896).

2³⁸⁹⁷⁹¹ is an apocalyptic number.

389791 is a deficient number, since it is larger than the sum of its proper divisors (1).

389791 is an equidigital number, since it uses as much as digits as its factorization.

389791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 37.

The square root of 389791 is about 624.3324434946. The cubic root of 389791 is about 73.0483822632.

The spelling of 389791 in words is "three hundred eighty-nine thousand, seven hundred ninety-one".