389221 has 4 divisors (see below), whose sum is σ = 444832. Its totient is φ = 333612.

The previous prime is 389219. The next prime is 389227. The reversal of 389221 is 122983.

389221 = 75² + 76² + ... + 116².

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: 122983 = 7 ⋅17569.

It is a cyclic number.

It is not a de Polignac number, because 389221 - 2¹ = 389219 is a prime.

It is a Duffinian number.

389221 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27795 + ... + 27808.

It is an arithmetic number, because the mean of its divisors is an integer number (111208).

2³⁸⁹²²¹ is an apocalyptic number.

It is an amenable number.

389221 is a deficient number, since it is larger than the sum of its proper divisors (55611).

389221 is an equidigital number, since it uses as much as digits as its factorization.

389221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55610.

The product of its digits is 864, while the sum is 25.

The square root of 389221 is about 623.8757889196. The cubic root of 389221 is about 73.0127581379.

The spelling of 389221 in words is "three hundred eighty-nine thousand, two hundred twenty-one".