566389 has 4 divisors (see below), whose sum is σ = 599724. Its totient is φ = 533056.

The previous prime is 566387. The next prime is 566393. The reversal of 566389 is 983665.

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 311364 + 255025 = 558^2 + 505^2 .

It is a cyclic number.

It is not a de Polignac number, because 566389 - 2¹ = 566387 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 (566387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16642 + ... + 16675.

It is an arithmetic number, because the mean of its divisors is an integer number (149931).

2⁵⁶⁶³⁸⁹ is an apocalyptic number.

It is an amenable number.

566389 is a deficient number, since it is larger than the sum of its proper divisors (33335).

566389 is a wasteful number, since it uses less digits than its factorization.

566389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33334.

The product of its digits is 38880, while the sum is 37.

The square root of 566389 is about 752.5882008110. The cubic root of 566389 is about 82.7379844001.

The spelling of 566389 in words is "five hundred sixty-six thousand, three hundred eighty-nine".