82065609 has 8 divisors (see below), whose sum is σ = 121578720. Its totient is φ = 54710388.

The previous prime is 82065601. The next prime is 82065611. The reversal of 82065609 is 90656028.

It is not a de Polignac number, because 82065609 - 2³ = 82065601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82065601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1519707 + ... + 1519760.

It is an arithmetic number, because the mean of its divisors is an integer number (15197340).

Almost surely, 2^82065609 is an apocalyptic number.

It is an amenable number.

82065609 is a deficient number, since it is larger than the sum of its proper divisors (39513111).

82065609 is a wasteful number, since it uses less digits than its factorization.

82065609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3039476 (or 3039470 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 82065609 is about 9059.0070647947. The cubic root of 82065609 is about 434.5639864221.

The spelling of 82065609 in words is "eighty-two million, sixty-five thousand, six hundred nine".