604781 has 2 divisors, whose sum is σ = 604782. Its totient is φ = 604780.

The previous prime is 604759. The next prime is 604787. The reversal of 604781 is 187406.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 592900 + 11881 = 770^2 + 109^2 .

It is a cyclic number.

It is not a de Polignac number, because 604781 - 2¹⁴ = 588397 is a prime.

It is a super-2 number, since 2×604781² = 731520115922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 604781.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 604781.

It is not a weakly prime, because it can be changed into another prime (604787) 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 as a sum of consecutive naturals, namely, 302390 + 302391.

It is an arithmetic number, because the mean of its divisors is an integer number (302391).

2⁶⁰⁴⁷⁸¹ is an apocalyptic number.

It is an amenable number.

604781 is a deficient number, since it is larger than the sum of its proper divisors (1).

604781 is an equidigital number, since it uses as much as digits as its factorization.

604781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 604781 is about 777.6766680311. The cubic root of 604781 is about 84.5666992023.

The spelling of 604781 in words is "six hundred four thousand, seven hundred eighty-one".