65845009 has 2 divisors, whose sum is σ = 65845010. Its totient is φ = 65845008.

The previous prime is 65845001. The next prime is 65845019. The reversal of 65845009 is 90054856.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64641600 + 1203409 = 8040^2 + 1097^2 .

It is a cyclic number.

It is not a de Polignac number, because 65845009 - 2³ = 65845001 is a prime.

It is not a weakly prime, because it can be changed into another prime (65845001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32922504 + 32922505.

It is an arithmetic number, because the mean of its divisors is an integer number (32922505).

Almost surely, 2^65845009 is an apocalyptic number.

It is an amenable number.

65845009 is a deficient number, since it is larger than the sum of its proper divisors (1).

65845009 is an equidigital number, since it uses as much as digits as its factorization.

65845009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 65845009 is about 8114.4937611659. The cubic root of 65845009 is about 403.8074127828.

The spelling of 65845009 in words is "sixty-five million, eight hundred forty-five thousand, nine".