65338261 has 2 divisors, whose sum is σ = 65338262. Its totient is φ = 65338260.

The previous prime is 65338243. The next prime is 65338271. The reversal of 65338261 is 16283356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44635761 + 20702500 = 6681^2 + 4550^2 .

It is a cyclic number.

It is not a de Polignac number, because 65338261 - 2¹¹ = 65336213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65338211) 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, 32669130 + 32669131.

It is an arithmetic number, because the mean of its divisors is an integer number (32669131).

Almost surely, 2^65338261 is an apocalyptic number.

It is an amenable number.

65338261 is a deficient number, since it is larger than the sum of its proper divisors (1).

65338261 is an equidigital number, since it uses as much as digits as its factorization.

65338261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 34.

The square root of 65338261 is about 8083.2085832298. The cubic root of 65338261 is about 402.7688334305.

The spelling of 65338261 in words is "sixty-five million, three hundred thirty-eight thousand, two hundred sixty-one".