65705243 has 2 divisors, whose sum is σ = 65705244. Its totient is φ = 65705242.

The previous prime is 65705203. The next prime is 65705261. The reversal of 65705243 is 34250756.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65705243 - 2²⁰ = 64656667 is a prime.

It is not a weakly prime, because it can be changed into another prime (65705203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32852621 + 32852622.

It is an arithmetic number, because the mean of its divisors is an integer number (32852622).

Almost surely, 2^65705243 is an apocalyptic number.

65705243 is a deficient number, since it is larger than the sum of its proper divisors (1).

65705243 is an equidigital number, since it uses as much as digits as its factorization.

65705243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 65705243 is about 8105.8770654384. The cubic root of 65705243 is about 403.5214962646.

Adding to 65705243 its reverse (34250756), we get a palindrome (99955999).

The spelling of 65705243 in words is "sixty-five million, seven hundred five thousand, two hundred forty-three".