389669 has 4 divisors (see below), whose sum is σ = 445344. Its totient is φ = 333996.

The previous prime is 389663. The next prime is 389687. The reversal of 389669 is 966983.

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: 966983 = 31 ⋅31193.

It is a cyclic number.

It is not a de Polignac number, because 389669 - 2¹² = 385573 is a prime.

It is a super-2 number, since 2×389669² = 303683859122, which contains 22 as substring.

It is a Duffinian 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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27827 + ... + 27840.

It is an arithmetic number, because the mean of its divisors is an integer number (111336).

2³⁸⁹⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

389669 is a deficient number, since it is larger than the sum of its proper divisors (55675).

389669 is an equidigital number, since it uses as much as digits as its factorization.

389669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55674.

The product of its digits is 69984, while the sum is 41.

The square root of 389669 is about 624.2347314913. The cubic root of 389669 is about 73.0407603730.

The spelling of 389669 in words is "three hundred eighty-nine thousand, six hundred sixty-nine".