163603 has 8 divisors (see below), whose sum is σ = 181440. Its totient is φ = 146280.

The previous prime is 163601. The next prime is 163613. The reversal of 163603 is 306361.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163603 - 2¹ = 163601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163601) 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 7 ways as a sum of consecutive naturals, for example, 1108 + ... + 1246.

It is an arithmetic number, because the mean of its divisors is an integer number (22680).

2¹⁶³⁶⁰³ is an apocalyptic number.

163603 is a deficient number, since it is larger than the sum of its proper divisors (17837).

163603 is a wasteful number, since it uses less digits than its factorization.

163603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 163603 is about 404.4786768175. The cubic root of 163603 is about 54.6928331670.

Adding to 163603 its reverse (306361), we get a palindrome (469964).

It can be divided in two parts, 163 and 603, that multiplied together give a palindrome (98289).

The spelling of 163603 in words is "one hundred sixty-three thousand, six hundred three".