389121 has 4 divisors (see below), whose sum is σ = 518832. Its totient is φ = 259412.

The previous prime is 389117. The next prime is 389141. The reversal of 389121 is 121983.

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.

It is a cyclic number.

It is not a de Polignac number, because 389121 - 2² = 389117 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 389091 and 389100.

It is not an unprimeable number, because it can be changed into a prime (389111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64851 + ... + 64856.

It is an arithmetic number, because the mean of its divisors is an integer number (129708).

It is a Proth number, since it is equal to 95 ⋅ 2¹² + 1 and 95 < 2¹².

2³⁸⁹¹²¹ is an apocalyptic number.

It is an amenable number.

389121 is a deficient number, since it is larger than the sum of its proper divisors (129711).

389121 is a wasteful number, since it uses less digits than its factorization.

389121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129710.

The product of its digits is 432, while the sum is 24.

The square root of 389121 is about 623.7956396128. The cubic root of 389121 is about 73.0065047059.

The spelling of 389121 in words is "three hundred eighty-nine thousand, one hundred twenty-one".