389684891 has 2 divisors, whose sum is σ = 389684892. Its totient is φ = 389684890.

The previous prime is 389684879. The next prime is 389684903. The reversal of 389684891 is 198486983.

It is a balanced prime because it is at equal distance from previous prime (389684879) and next prime (389684903).

It is an emirp because it is prime and its reverse (198486983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 389684891 - 2¹⁰ = 389683867 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (389680891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194842445 + 194842446.

It is an arithmetic number, because the mean of its divisors is an integer number (194842446).

Almost surely, 2^389684891 is an apocalyptic number.

389684891 is a deficient number, since it is larger than the sum of its proper divisors (1).

389684891 is an equidigital number, since it uses as much as digits as its factorization.

389684891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2985984, while the sum is 56.

The square root of 389684891 is about 19740.4379637332. The cubic root of 389684891 is about 730.4175324559.

The spelling of 389684891 in words is "three hundred eighty-nine million, six hundred eighty-four thousand, eight hundred ninety-one".