389424649 has 2 divisors, whose sum is σ = 389424650. Its totient is φ = 389424648.

The previous prime is 389424611. The next prime is 389424653. The reversal of 389424649 is 946424983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 340144249 + 49280400 = 18443^2 + 7020^2 .

It is a cyclic number.

It is not a de Polignac number, because 389424649 - 2¹¹ = 389422601 is a prime.

It is not a weakly prime, because it can be changed into another prime (389424689) 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, 194712324 + 194712325.

It is an arithmetic number, because the mean of its divisors is an integer number (194712325).

Almost surely, 2^389424649 is an apocalyptic number.

It is an amenable number.

389424649 is a deficient number, since it is larger than the sum of its proper divisors (1).

389424649 is an equidigital number, since it uses as much as digits as its factorization.

389424649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1492992, while the sum is 49.

The square root of 389424649 is about 19733.8452664452. The cubic root of 389424649 is about 730.2548987876.

The spelling of 389424649 in words is "three hundred eighty-nine million, four hundred twenty-four thousand, six hundred forty-nine".