565305901 has 2 divisors, whose sum is σ = 565305902. Its totient is φ = 565305900.

The previous prime is 565305899. The next prime is 565305953. The reversal of 565305901 is 109503565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 482022025 + 83283876 = 21955^2 + 9126^2 .

It is a cyclic number.

It is not a de Polignac number, because 565305901 - 2¹ = 565305899 is a prime.

Together with 565305899, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (565305001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282652950 + 282652951.

It is an arithmetic number, because the mean of its divisors is an integer number (282652951).

Almost surely, 2^565305901 is an apocalyptic number.

It is an amenable number.

565305901 is a deficient number, since it is larger than the sum of its proper divisors (1).

565305901 is an equidigital number, since it uses as much as digits as its factorization.

565305901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20250, while the sum is 34.

The square root of 565305901 is about 23776.1624531799. The cubic root of 565305901 is about 826.8521112284.

The spelling of 565305901 in words is "five hundred sixty-five million, three hundred five thousand, nine hundred one".