389424689 has 2 divisors, whose sum is σ = 389424690. Its totient is φ = 389424688.

The previous prime is 389424653. The next prime is 389424701. The reversal of 389424689 is 986424983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 331786225 + 57638464 = 18215^2 + 7592^2 .

It is a cyclic number.

It is not a de Polignac number, because 389424689 - 2⁸ = 389424433 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 389424689.

It is not a weakly prime, because it can be changed into another prime (389424649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194712344 + 194712345.

It is an arithmetic number, because the mean of its divisors is an integer number (194712345).

Almost surely, 2^389424689 is an apocalyptic number.

It is an amenable number.

389424689 is a deficient number, since it is larger than the sum of its proper divisors (1).

389424689 is an equidigital number, since it uses as much as digits as its factorization.

389424689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2985984, while the sum is 53.

The square root of 389424689 is about 19733.8462799324. The cubic root of 389424689 is about 730.2549237904.

The spelling of 389424689 in words is "three hundred eighty-nine million, four hundred twenty-four thousand, six hundred eighty-nine".