605749 has 4 divisors (see below), whose sum is σ = 608364. Its totient is φ = 603136.

The previous prime is 605719. The next prime is 605779. The reversal of 605749 is 947506.

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

It is an interprime number because it is at equal distance from previous prime (605719) and next prime (605779).

It can be written as a sum of positive squares in 2 ways, for example, as 396900 + 208849 = 630^2 + 457^2 .

It is a cyclic number.

It is not a de Polignac number, because 605749 - 2⁹ = 605237 is a prime.

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 a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 605749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (605719) 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, 922 + ... + 1435.

It is an arithmetic number, because the mean of its divisors is an integer number (152091).

2⁶⁰⁵⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

605749 is a deficient number, since it is larger than the sum of its proper divisors (2615).

605749 is a wasteful number, since it uses less digits than its factorization.

605749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2614.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 605749 is about 778.2987858143. The cubic root of 605749 is about 84.6117937234.

The spelling of 605749 in words is "six hundred five thousand, seven hundred forty-nine".