565894409 has 4 divisors (see below), whose sum is σ = 576571716. Its totient is φ = 555217104.

The previous prime is 565894397. The next prime is 565894447. The reversal of 565894409 is 904498565.

565894409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 904498565 = 5 ⋅180899713.

It can be written as a sum of positive squares in 2 ways, for example, as 218892025 + 347002384 = 14795^2 + 18628^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-565894409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (565894489) 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, 5338574 + ... + 5338679.

It is an arithmetic number, because the mean of its divisors is an integer number (144142929).

Almost surely, 2^565894409 is an apocalyptic number.

It is an amenable number.

565894409 is a deficient number, since it is larger than the sum of its proper divisors (10677307).

565894409 is a wasteful number, since it uses less digits than its factorization.

565894409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10677306.

The product of its (nonzero) digits is 1555200, while the sum is 50.

The square root of 565894409 is about 23788.5352428433. The cubic root of 565894409 is about 827.1389413727.

The spelling of 565894409 in words is "five hundred sixty-five million, eight hundred ninety-four thousand, four hundred nine".