389698909 has 2 divisors, whose sum is σ = 389698910. Its totient is φ = 389698908.

The previous prime is 389698889. The next prime is 389698937. The reversal of 389698909 is 909896983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225090009 + 164608900 = 15003^2 + 12830^2 .

It is a cyclic number.

It is not a de Polignac number, because 389698909 - 2¹¹ = 389696861 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389698999) 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, 194849454 + 194849455.

It is an arithmetic number, because the mean of its divisors is an integer number (194849455).

Almost surely, 2^389698909 is an apocalyptic number.

It is an amenable number.

389698909 is a deficient number, since it is larger than the sum of its proper divisors (1).

389698909 is an equidigital number, since it uses as much as digits as its factorization.

389698909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7558272, while the sum is 61.

The square root of 389698909 is about 19740.7930185188. The cubic root of 389698909 is about 730.4262907034.

The spelling of 389698909 in words is "three hundred eighty-nine million, six hundred ninety-eight thousand, nine hundred nine".