389503 has 4 divisors (see below), whose sum is σ = 391248. Its totient is φ = 387760.

The previous prime is 389483. The next prime is 389507. The reversal of 389503 is 305983.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 389503 - 2⁹ = 388991 is a prime.

It is a super-3 number, since 3×389503³ = 177277523333299581, which contains 333 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 (389507) 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, 478 + ... + 1003.

It is an arithmetic number, because the mean of its divisors is an integer number (97812).

2³⁸⁹⁵⁰³ is an apocalyptic number.

389503 is a deficient number, since it is larger than the sum of its proper divisors (1745).

389503 is a wasteful number, since it uses less digits than its factorization.

389503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 389503 is about 624.1017545241. The cubic root of 389503 is about 73.0303870491.

The spelling of 389503 in words is "three hundred eighty-nine thousand, five hundred three".