65275709 has 2 divisors, whose sum is σ = 65275710. Its totient is φ = 65275708.

The previous prime is 65275681. The next prime is 65275711. The reversal of 65275709 is 90757256.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35736484 + 29539225 = 5978^2 + 5435^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65275709 is a prime.

It is a Sophie Germain prime.

Together with 65275711, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65275759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32637854 + 32637855.

It is an arithmetic number, because the mean of its divisors is an integer number (32637855).

Almost surely, 2^65275709 is an apocalyptic number.

It is an amenable number.

65275709 is a deficient number, since it is larger than the sum of its proper divisors (1).

65275709 is an equidigital number, since it uses as much as digits as its factorization.

65275709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 132300, while the sum is 41.

The square root of 65275709 is about 8079.3384011316. The cubic root of 65275709 is about 402.6402612900.

The spelling of 65275709 in words is "sixty-five million, two hundred seventy-five thousand, seven hundred nine".