82009689 has 16 divisors (see below), whose sum is σ = 111974400. Its totient is φ = 53365520.

The previous prime is 82009687. The next prime is 82009693. The reversal of 82009689 is 98690028.

It is a cyclic number.

It is not a de Polignac number, because 82009689 - 2¹ = 82009687 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82009689.

It is not an unprimeable number, because it can be changed into a prime (82009687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83974 + ... + 84944.

It is an arithmetic number, because the mean of its divisors is an integer number (6998400).

Almost surely, 2^82009689 is an apocalyptic number.

It is an amenable number.

82009689 is a deficient number, since it is larger than the sum of its proper divisors (29964711).

82009689 is a wasteful number, since it uses less digits than its factorization.

82009689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 82009689 is about 9055.9201078631. The cubic root of 82009689 is about 434.4652591554.

The spelling of 82009689 in words is "eighty-two million, nine thousand, six hundred eighty-nine".