65775089 has 2 divisors, whose sum is σ = 65775090. Its totient is φ = 65775088.

The previous prime is 65775053. The next prime is 65775097. The reversal of 65775089 is 98057756.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52085089 + 13690000 = 7217^2 + 3700^2 .

It is a cyclic number.

It is not a de Polignac number, because 65775089 - 2²⁴ = 48997873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65675089) 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, 32887544 + 32887545.

It is an arithmetic number, because the mean of its divisors is an integer number (32887545).

Almost surely, 2^65775089 is an apocalyptic number.

It is an amenable number.

65775089 is a deficient number, since it is larger than the sum of its proper divisors (1).

65775089 is an equidigital number, since it uses as much as digits as its factorization.

65775089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 529200, while the sum is 47.

The square root of 65775089 is about 8110.1842765747. The cubic root of 65775089 is about 403.6644294624.

The spelling of 65775089 in words is "sixty-five million, seven hundred seventy-five thousand, eighty-nine".