65481589 has 2 divisors, whose sum is σ = 65481590. Its totient is φ = 65481588.

The previous prime is 65481571. The next prime is 65481613. The reversal of 65481589 is 98518456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65448100 + 33489 = 8090^2 + 183^2 .

It is a cyclic number.

It is not a de Polignac number, because 65481589 - 2⁵ = 65481557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65481289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32740794 + 32740795.

It is an arithmetic number, because the mean of its divisors is an integer number (32740795).

Almost surely, 2^65481589 is an apocalyptic number.

It is an amenable number.

65481589 is a deficient number, since it is larger than the sum of its proper divisors (1).

65481589 is an equidigital number, since it uses as much as digits as its factorization.

65481589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345600, while the sum is 46.

The square root of 65481589 is about 8092.0695128008. The cubic root of 65481589 is about 403.0631270062.

The spelling of 65481589 in words is "sixty-five million, four hundred eighty-one thousand, five hundred eighty-nine".