65241809 has 2 divisors, whose sum is σ = 65241810. Its totient is φ = 65241808.

The previous prime is 65241797. The next prime is 65241817. The reversal of 65241809 is 90814256.

65241809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38688400 + 26553409 = 6220^2 + 5153^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65241809 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65241109) 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, 32620904 + 32620905.

It is an arithmetic number, because the mean of its divisors is an integer number (32620905).

Almost surely, 2^65241809 is an apocalyptic number.

It is an amenable number.

65241809 is a deficient number, since it is larger than the sum of its proper divisors (1).

65241809 is an equidigital number, since it uses as much as digits as its factorization.

65241809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 65241809 is about 8077.2401846175. The cubic root of 65241809 is about 402.5705474120.

The spelling of 65241809 in words is "sixty-five million, two hundred forty-one thousand, eight hundred nine".