82808065 has 4 divisors (see below), whose sum is σ = 99369684. Its totient is φ = 66246448.

The previous prime is 82808057. The next prime is 82808087. The reversal of 82808065 is 56080828.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60980481 + 21827584 = 7809^2 + 4672^2 .

It is a cyclic number.

It is not a de Polignac number, because 82808065 - 2³ = 82808057 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8280802 + ... + 8280811.

It is an arithmetic number, because the mean of its divisors is an integer number (24842421).

Almost surely, 2^82808065 is an apocalyptic number.

It is an amenable number.

82808065 is a deficient number, since it is larger than the sum of its proper divisors (16561619).

82808065 is a wasteful number, since it uses less digits than its factorization.

82808065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16561618.

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 82808065 is about 9099.8936806976. The cubic root of 82808065 is about 435.8705690635.

The spelling of 82808065 in words is "eighty-two million, eight hundred eight thousand, sixty-five".