603993 has 16 divisors (see below), whose sum is σ = 919296. Its totient is φ = 349440.

The previous prime is 603989. The next prime is 604001. The reversal of 603993 is 399306.

It is not a de Polignac number, because 603993 - 2² = 603989 is a prime.

603993 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 603993.

It is not an unprimeable number, because it can be changed into a prime (603913) 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 15 ways as a sum of consecutive naturals, for example, 208 + ... + 1118.

It is an arithmetic number, because the mean of its divisors is an integer number (57456).

2⁶⁰³⁹⁹³ is an apocalyptic number.

It is an amenable number.

603993 is a deficient number, since it is larger than the sum of its proper divisors (315303).

603993 is a wasteful number, since it uses less digits than its factorization.

603993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944.

The product of its (nonzero) digits is 4374, while the sum is 30.

The square root of 603993 is about 777.1698656021. The cubic root of 603993 is about 84.5299544841.

It can be divided in two parts, 603 and 993, that added together give a triangular number (1596 = T₅₆).

The spelling of 603993 in words is "six hundred three thousand, nine hundred ninety-three".