389551 has 4 divisors (see below), whose sum is σ = 406512. Its totient is φ = 372592.

The previous prime is 389539. The next prime is 389561. The reversal of 389551 is 155983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155983 = 151 ⋅1033.

It is a cyclic number.

It is not a de Polignac number, because 389551 - 2¹¹ = 387503 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389531) 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, 8446 + ... + 8491.

It is an arithmetic number, because the mean of its divisors is an integer number (101628).

2³⁸⁹⁵⁵¹ is an apocalyptic number.

389551 is a deficient number, since it is larger than the sum of its proper divisors (16961).

389551 is a wasteful number, since it uses less digits than its factorization.

389551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16960.

The product of its digits is 5400, while the sum is 31.

The square root of 389551 is about 624.1402086070. The cubic root of 389551 is about 73.0333868673.

The spelling of 389551 in words is "three hundred eighty-nine thousand, five hundred fifty-one".