65747609 has 2 divisors, whose sum is σ = 65747610. Its totient is φ = 65747608.

The previous prime is 65747603. The next prime is 65747623. The reversal of 65747609 is 90674756.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63952009 + 1795600 = 7997^2 + 1340^2 .

It is a cyclic number.

It is not a de Polignac number, because 65747609 - 2¹⁶ = 65682073 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65747609.

It is not a weakly prime, because it can be changed into another prime (65747603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32873804 + 32873805.

It is an arithmetic number, because the mean of its divisors is an integer number (32873805).

Almost surely, 2^65747609 is an apocalyptic number.

It is an amenable number.

65747609 is a deficient number, since it is larger than the sum of its proper divisors (1).

65747609 is an equidigital number, since it uses as much as digits as its factorization.

65747609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 317520, while the sum is 44.

The square root of 65747609 is about 8108.4899333970. The cubic root of 65747609 is about 403.6082063347.

The spelling of 65747609 in words is "sixty-five million, seven hundred forty-seven thousand, six hundred nine".