65091779 has 2 divisors, whose sum is σ = 65091780. Its totient is φ = 65091778.

The previous prime is 65091751. The next prime is 65091797. The reversal of 65091779 is 97719056.

65091779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (65091797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65091779 - 2¹² = 65087683 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65091749) 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, 32545889 + 32545890.

It is an arithmetic number, because the mean of its divisors is an integer number (32545890).

Almost surely, 2^65091779 is an apocalyptic number.

65091779 is a deficient number, since it is larger than the sum of its proper divisors (1).

65091779 is an equidigital number, since it uses as much as digits as its factorization.

65091779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 119070, while the sum is 44.

The square root of 65091779 is about 8067.9476324528. The cubic root of 65091779 is about 402.2617269578.

It can be divided in two parts, 650 and 91779, that added together give a palindrome (92429).

The spelling of 65091779 in words is "sixty-five million, ninety-one thousand, seven hundred seventy-nine".