826805305 has 4 divisors (see below), whose sum is σ = 992166372. Its totient is φ = 661444240.

The previous prime is 826805263. The next prime is 826805323. The reversal of 826805305 is 503508628.

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 282609721 + 544195584 = 16811^2 + 23328^2 .

It is not a de Polignac number, because 826805305 - 2²⁵ = 793250873 is a prime.

It is a super-2 number, since 2×826805305² = 1367214024752286050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82680526 + ... + 82680535.

It is an arithmetic number, because the mean of its divisors is an integer number (248041593).

Almost surely, 2^826805305 is an apocalyptic number.

It is an amenable number.

826805305 is a deficient number, since it is larger than the sum of its proper divisors (165361067).

826805305 is a wasteful number, since it uses less digits than its factorization.

826805305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165361066.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 826805305 is about 28754.2223855906. Note that the first 3 decimals coincide. The cubic root of 826805305 is about 938.5723404832.

The spelling of 826805305 in words is "eight hundred twenty-six million, eight hundred five thousand, three hundred five".