82605865 has 8 divisors (see below), whose sum is σ = 99497160. Its totient is φ = 65837952.

The previous prime is 82605827. The next prime is 82605869. The reversal of 82605865 is 56850628.

It can be written as a sum of positive squares in 4 ways, for example, as 104976 + 82500889 = 324^2 + 9083^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82605865 - 2¹³ = 82597673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82605869) 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, 29364 + ... + 32053.

It is an arithmetic number, because the mean of its divisors is an integer number (12437145).

Almost surely, 2^82605865 is an apocalyptic number.

It is an amenable number.

82605865 is a deficient number, since it is larger than the sum of its proper divisors (16891295).

82605865 is a wasteful number, since it uses less digits than its factorization.

82605865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61691.

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 82605865 is about 9088.7768704045. The cubic root of 82605865 is about 435.5155116155.

The spelling of 82605865 in words is "eighty-two million, six hundred five thousand, eight hundred sixty-five".