65393609 has 2 divisors, whose sum is σ = 65393610. Its totient is φ = 65393608.

The previous prime is 65393599. The next prime is 65393633. The reversal of 65393609 is 90639356.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64048009 + 1345600 = 8003^2 + 1160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65393609 is a prime.

It is not a weakly prime, because it can be changed into another prime (65393639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32696804 + 32696805.

It is an arithmetic number, because the mean of its divisors is an integer number (32696805).

Almost surely, 2^65393609 is an apocalyptic number.

It is an amenable number.

65393609 is a deficient number, since it is larger than the sum of its proper divisors (1).

65393609 is an equidigital number, since it uses as much as digits as its factorization.

65393609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 131220, while the sum is 41.

The square root of 65393609 is about 8086.6314989617. The cubic root of 65393609 is about 402.8825297414.

The spelling of 65393609 in words is "sixty-five million, three hundred ninety-three thousand, six hundred nine".