65783813 has 2 divisors, whose sum is σ = 65783814. Its totient is φ = 65783812.

The previous prime is 65783801. The next prime is 65783821. The reversal of 65783813 is 31838756.

65783813 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., 36699364 + 29084449 = 6058^2 + 5393^2 .

It is a cyclic number.

It is not a de Polignac number, because 65783813 - 2¹⁰ = 65782789 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65783713) 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, 32891906 + 32891907.

It is an arithmetic number, because the mean of its divisors is an integer number (32891907).

Almost surely, 2^65783813 is an apocalyptic number.

It is an amenable number.

65783813 is a deficient number, since it is larger than the sum of its proper divisors (1).

65783813 is an equidigital number, since it uses as much as digits as its factorization.

65783813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 65783813 is about 8110.7221010216. The cubic root of 65783813 is about 403.6822751892.

The spelling of 65783813 in words is "sixty-five million, seven hundred eighty-three thousand, eight hundred thirteen".