82806905 has 4 divisors (see below), whose sum is σ = 99368292. Its totient is φ = 66245520.

The previous prime is 82806869. The next prime is 82806907. The reversal of 82806905 is 50960828.

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 20539024 + 62267881 = 4532^2 + 7891^2 .

It is not a de Polignac number, because 82806905 - 2¹⁰ = 82805881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82806907) 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, 8280686 + ... + 8280695.

It is an arithmetic number, because the mean of its divisors is an integer number (24842073).

Almost surely, 2^82806905 is an apocalyptic number.

It is an amenable number.

82806905 is a deficient number, since it is larger than the sum of its proper divisors (16561387).

82806905 is a wasteful number, since it uses less digits than its factorization.

82806905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16561386.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 82806905 is about 9099.8299434660. The cubic root of 82806905 is about 435.8685337858.

The spelling of 82806905 in words is "eighty-two million, eight hundred six thousand, nine hundred five".