389661 has 4 divisors (see below), whose sum is σ = 519552. Its totient is φ = 259772.

The previous prime is 389659. The next prime is 389663. The reversal of 389661 is 166983.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 166983 = 3 ⋅55661.

It is an interprime number because it is at equal distance from previous prime (389659) and next prime (389663).

It is a cyclic number.

It is not a de Polignac number, because 389661 - 2¹ = 389659 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64941 + ... + 64946.

It is an arithmetic number, because the mean of its divisors is an integer number (129888).

2³⁸⁹⁶⁶¹ is an apocalyptic number.

It is an amenable number.

389661 is a deficient number, since it is larger than the sum of its proper divisors (129891).

389661 is a wasteful number, since it uses less digits than its factorization.

389661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129890.

The product of its digits is 7776, while the sum is 33.

The square root of 389661 is about 624.2283236124. The cubic root of 389661 is about 73.0402605214.

The spelling of 389661 in words is "three hundred eighty-nine thousand, six hundred sixty-one".