389657089 has 4 divisors (see below), whose sum is σ = 389696580. Its totient is φ = 389617600.

The previous prime is 389657087. The next prime is 389657117. The reversal of 389657089 is 980756983.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 88981489 + 300675600 = 9433^2 + 17340^2 .

It is a cyclic number.

It is not a de Polignac number, because 389657089 - 2¹ = 389657087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389657083) 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 in 3 ways as a sum of consecutive naturals, for example, 9189 + ... + 29389.

It is an arithmetic number, because the mean of its divisors is an integer number (97424145).

Almost surely, 2^389657089 is an apocalyptic number.

It is an amenable number.

389657089 is a deficient number, since it is larger than the sum of its proper divisors (39491).

389657089 is a wasteful number, since it uses less digits than its factorization.

389657089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39490.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The square root of 389657089 is about 19739.7337621357. The cubic root of 389657089 is about 730.4001615393.

The spelling of 389657089 in words is "three hundred eighty-nine million, six hundred fifty-seven thousand, eighty-nine".