65384581 has 2 divisors, whose sum is σ = 65384582. Its totient is φ = 65384580.

The previous prime is 65384573. The next prime is 65384591. The reversal of 65384581 is 18548356.

65384581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56776225 + 8608356 = 7535^2 + 2934^2 .

It is a cyclic number.

It is not a de Polignac number, because 65384581 - 2³ = 65384573 is a prime.

It is a super-2 number, since 2×65384581² = 8550286865091122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65384591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32692290 + 32692291.

It is an arithmetic number, because the mean of its divisors is an integer number (32692291).

Almost surely, 2^65384581 is an apocalyptic number.

It is an amenable number.

65384581 is a deficient number, since it is larger than the sum of its proper divisors (1).

65384581 is an equidigital number, since it uses as much as digits as its factorization.

65384581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 115200, while the sum is 40.

The square root of 65384581 is about 8086.0732744639. The cubic root of 65384581 is about 402.8639887304.

The spelling of 65384581 in words is "sixty-five million, three hundred eighty-four thousand, five hundred eighty-one".