65423909 has 2 divisors, whose sum is σ = 65423910. Its totient is φ = 65423908.

The previous prime is 65423893. The next prime is 65423933. The reversal of 65423909 is 90932456.

65423909 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., 33895684 + 31528225 = 5822^2 + 5615^2 .

It is a cyclic number.

It is not a de Polignac number, because 65423909 - 2⁴ = 65423893 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65423999) 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, 32711954 + 32711955.

It is an arithmetic number, because the mean of its divisors is an integer number (32711955).

Almost surely, 2^65423909 is an apocalyptic number.

It is an amenable number.

65423909 is a deficient number, since it is larger than the sum of its proper divisors (1).

65423909 is an equidigital number, since it uses as much as digits as its factorization.

65423909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 65423909 is about 8088.5047443888. The cubic root of 65423909 is about 402.9447450756.

The spelling of 65423909 in words is "sixty-five million, four hundred twenty-three thousand, nine hundred nine".