605705857 has 4 divisors (see below), whose sum is σ = 606253140. Its totient is φ = 605158576.

The previous prime is 605705839. The next prime is 605705887. The reversal of 605705857 is 758507506.

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

It can be written as a sum of positive squares in 2 ways, for example, as 59969536 + 545736321 = 7744^2 + 23361^2 .

It is a cyclic number.

It is not a de Polignac number, because 605705857 - 2¹⁹ = 605181569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (605705887) 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, 271978 + ... + 274195.

It is an arithmetic number, because the mean of its divisors is an integer number (151563285).

Almost surely, 2^605705857 is an apocalyptic number.

It is an amenable number.

605705857 is a deficient number, since it is larger than the sum of its proper divisors (547283).

605705857 is a wasteful number, since it uses less digits than its factorization.

605705857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547282.

The product of its (nonzero) digits is 294000, while the sum is 43.

The square root of 605705857 is about 24611.0921537424. The cubic root of 605705857 is about 846.0978491930.

The spelling of 605705857 in words is "six hundred five million, seven hundred five thousand, eight hundred fifty-seven".