566989609 has 4 divisors (see below), whose sum is σ = 567170704. Its totient is φ = 566808516.

The previous prime is 566989607. The next prime is 566989637. The reversal of 566989609 is 906989665.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 906989665 = 5 ⋅181397933.

It is a cyclic number.

It is not a de Polignac number, because 566989609 - 2¹ = 566989607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (566989603) 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, 85767 + ... + 92140.

It is an arithmetic number, because the mean of its divisors is an integer number (141792676).

Almost surely, 2^566989609 is an apocalyptic number.

It is an amenable number.

566989609 is a deficient number, since it is larger than the sum of its proper divisors (181095).

566989609 is a wasteful number, since it uses less digits than its factorization.

566989609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181094.

The product of its (nonzero) digits is 6298560, while the sum is 58.

The square root of 566989609 is about 23811.5436080906. The cubic root of 566989609 is about 827.6721968021.

The spelling of 566989609 in words is "five hundred sixty-six million, nine hundred eighty-nine thousand, six hundred nine".