203390 has 24 divisors (see below), whose sum is σ = 408888. Its totient is φ = 72240.

The previous prime is 203387. The next prime is 203393. The reversal of 203390 is 93302.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (203387) and next prime (203393).

It is a plaindrome in base 9.

It is a nialpdrome in base 12.

It is a zygodrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203393) 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 11 ways as a sum of consecutive naturals, for example, 4709 + ... + 4751.

It is an arithmetic number, because the mean of its divisors is an integer number (17037).

2²⁰³³⁹⁰ is an apocalyptic number.

203390 is an abundant number, since it is smaller than the sum of its proper divisors (205498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

203390 is a wasteful number, since it uses less digits than its factorization.

203390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 203390 is about 450.9878047132. The cubic root of 203390 is about 58.8089193127.

Adding to 203390 its reverse (93302), we get a palindrome (296692).

The spelling of 203390 in words is "two hundred three thousand, three hundred ninety".