343603 has 4 divisors (see below), whose sum is σ = 370048. Its totient is φ = 317160.

The previous prime is 343601. The next prime is 343627. The reversal of 343603 is 306343.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 306343 = 113 ⋅2711.

It is a cyclic number.

It is not a de Polignac number, because 343603 - 2¹ = 343601 is a prime.

It is a Duffinian number.

343603 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (343601) 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, 13203 + ... + 13228.

It is an arithmetic number, because the mean of its divisors is an integer number (92512).

2³⁴³⁶⁰³ is an apocalyptic number.

343603 is a deficient number, since it is larger than the sum of its proper divisors (26445).

343603 is a wasteful number, since it uses less digits than its factorization.

343603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26444.

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 343603 is about 586.1765945515. The cubic root of 343603 is about 70.0409963934.

Adding to 343603 its reverse (306343), we get a palindrome (649946).

It can be divided in two parts, 343 and 603, that added together give a triangular number (946 = T₄₃).

The spelling of 343603 in words is "three hundred forty-three thousand, six hundred three".