389969 has 4 divisors (see below), whose sum is σ = 391680. Its totient is φ = 388260.

The previous prime is 389957. The next prime is 389971. The reversal of 389969 is 969983.

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: 969983 = 7 ⋅138569.

It is a cyclic number.

It is not a de Polignac number, because 389969 - 2⁴ = 389953 is a prime.

It is a super-2 number, since 2×389969² = 304151641922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (389989) 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, 449 + ... + 990.

It is an arithmetic number, because the mean of its divisors is an integer number (97920).

2³⁸⁹⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

389969 is a deficient number, since it is larger than the sum of its proper divisors (1711).

389969 is a wasteful number, since it uses less digits than its factorization.

389969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1710.

The product of its digits is 104976, while the sum is 44.

The square root of 389969 is about 624.4749794828. The cubic root of 389969 is about 73.0594998735.

The spelling of 389969 in words is "three hundred eighty-nine thousand, nine hundred sixty-nine".