8208705205 has 4 divisors (see below), whose sum is σ = 9850446252. Its totient is φ = 6566964160.

The previous prime is 8208705191. The next prime is 8208705247. The reversal of 8208705205 is 5025078028.

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 5438472516 + 2770232689 = 73746^2 + 52633^2 .

It is not a de Polignac number, because 8208705205 - 2¹⁹ = 8208180917 is a prime.

It is a super-2 number, since 2×8208705205² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 820870516 + ... + 820870525.

It is an arithmetic number, because the mean of its divisors is an integer number (2462611563).

Almost surely, 2^8208705205 is an apocalyptic number.

It is an amenable number.

8208705205 is a deficient number, since it is larger than the sum of its proper divisors (1641741047).

8208705205 is a wasteful number, since it uses less digits than its factorization.

8208705205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641741046.

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 8208705205 is about 90601.9050848270. The cubic root of 8208705205 is about 2017.2430124510.

The spelling of 8208705205 in words is "eight billion, two hundred eight million, seven hundred five thousand, two hundred five".