604391 has 4 divisors (see below), whose sum is σ = 606000. Its totient is φ = 602784.

The previous prime is 604379. The next prime is 604397. The reversal of 604391 is 193406.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 193406 = 2 ⋅96703.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-604391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (604397) 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, 95 + ... + 1103.

It is an arithmetic number, because the mean of its divisors is an integer number (151500).

2⁶⁰⁴³⁹¹ is an apocalyptic number.

604391 is a deficient number, since it is larger than the sum of its proper divisors (1609).

604391 is a wasteful number, since it uses less digits than its factorization.

604391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1608.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 604391 is about 777.4258807115. The cubic root of 604391 is about 84.5485173565.

Adding to 604391 its reverse (193406), we get a palindrome (797797).

The spelling of 604391 in words is "six hundred four thousand, three hundred ninety-one".