5657809 has 4 divisors (see below), whose sum is σ = 5694004. Its totient is φ = 5621616.

The previous prime is 5657789. The next prime is 5657831. The reversal of 5657809 is 9087565.

It is a happy number.

5657809 is nontrivially palindromic in base 13.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9087565 = 5 ⋅1817513.

It can be written as a sum of positive squares in 2 ways, for example, as 1056784 + 4601025 = 1028^2 + 2145^2 .

It is a cyclic number.

It is not a de Polignac number, because 5657809 - 2⁹ = 5657297 is a prime.

It is a super-3 number, since 3×5657809³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5757809) 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, 17862 + ... + 18175.

It is an arithmetic number, because the mean of its divisors is an integer number (1423501).

Almost surely, 2^5657809 is an apocalyptic number.

It is an amenable number.

5657809 is a deficient number, since it is larger than the sum of its proper divisors (36195).

5657809 is a wasteful number, since it uses less digits than its factorization.

5657809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36194.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 5657809 is about 2378.6149331071. The cubic root of 5657809 is about 178.1897673163.

The spelling of 5657809 in words is "five million, six hundred fifty-seven thousand, eight hundred nine".