603994 has 4 divisors (see below), whose sum is σ = 905994. Its totient is φ = 301996.

The previous prime is 603989. The next prime is 604001. The reversal of 603994 is 499306.

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

It can be written as a sum of positive squares in only one way, i.e., 585225 + 18769 = 765^2 + 137^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 150997 + ... + 151000.

2⁶⁰³⁹⁹⁴ is an apocalyptic number.

603994 is a deficient number, since it is larger than the sum of its proper divisors (302000).

603994 is a wasteful number, since it uses less digits than its factorization.

603994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301999.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 603994 is about 777.1705089618. The cubic root of 603994 is about 84.5300011347.

The spelling of 603994 in words is "six hundred three thousand, nine hundred ninety-four".