389897605 has 8 divisors (see below), whose sum is σ = 484011000. Its totient is φ = 301162176.

The previous prime is 389897603. The next prime is 389897609. The reversal of 389897605 is 506798983.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 111556 + 389786049 = 334^2 + 19743^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 389897605 - 2¹ = 389897603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389897603) 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 in 7 ways as a sum of consecutive naturals, for example, 1344330 + ... + 1344619.

It is an arithmetic number, because the mean of its divisors is an integer number (60501375).

Almost surely, 2^389897605 is an apocalyptic number.

It is an amenable number.

389897605 is a deficient number, since it is larger than the sum of its proper divisors (94113395).

389897605 is a wasteful number, since it uses less digits than its factorization.

389897605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2688983.

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

The square root of 389897605 is about 19745.8250017567. The cubic root of 389897605 is about 730.5504105641.

The spelling of 389897605 in words is "three hundred eighty-nine million, eight hundred ninety-seven thousand, six hundred five".