65275209 has 6 divisors (see below), whose sum is σ = 94286426. Its totient is φ = 43516800.

The previous prime is 65275207. The next prime is 65275229. The reversal of 65275209 is 90257256.

It can be written as a sum of positive squares in only one way, i.e., 47610000 + 17665209 = 6900^2 + 4203^2 .

It is not a de Polignac number, because 65275209 - 2¹ = 65275207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65275207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3626392 + ... + 3626409.

Almost surely, 2^65275209 is an apocalyptic number.

It is an amenable number.

65275209 is a deficient number, since it is larger than the sum of its proper divisors (29011217).

65275209 is a wasteful number, since it uses less digits than its factorization.

65275209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7252807 (or 7252804 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 65275209 is about 8079.3074579446. The cubic root of 65275209 is about 402.6392332371.

The spelling of 65275209 in words is "sixty-five million, two hundred seventy-five thousand, two hundred nine".