82805807 has 4 divisors (see below), whose sum is σ = 94635216. Its totient is φ = 70976400.

The previous prime is 82805803. The next prime is 82805881. The reversal of 82805807 is 70850828.

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

It is a cyclic number.

It is not a de Polignac number, because 82805807 - 2² = 82805803 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82805803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5914694 + ... + 5914707.

It is an arithmetic number, because the mean of its divisors is an integer number (23658804).

Almost surely, 2^82805807 is an apocalyptic number.

82805807 is a deficient number, since it is larger than the sum of its proper divisors (11829409).

82805807 is a wasteful number, since it uses less digits than its factorization.

82805807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11829408.

The product of its (nonzero) digits is 35840, while the sum is 38.

The square root of 82805807 is about 9099.7696124682. The cubic root of 82805807 is about 435.8666072727.

The spelling of 82805807 in words is "eighty-two million, eight hundred five thousand, eight hundred seven".