389891 has 2 divisors, whose sum is σ = 389892. Its totient is φ = 389890.

The previous prime is 389867. The next prime is 389897. The reversal of 389891 is 198983.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 389891 - 2¹⁸ = 127747 is a prime.

It is not a weakly prime, because it can be changed into another prime (389897) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194945 + 194946.

It is an arithmetic number, because the mean of its divisors is an integer number (194946).

2³⁸⁹⁸⁹¹ is an apocalyptic number.

389891 is a deficient number, since it is larger than the sum of its proper divisors (1).

389891 is an equidigital number, since it uses as much as digits as its factorization.

389891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 38.

The square root of 389891 is about 624.4125238975. The cubic root of 389891 is about 73.0546285282.

The spelling of 389891 in words is "three hundred eighty-nine thousand, eight hundred ninety-one".