827065817 has 4 divisors (see below), whose sum is σ = 847238196. Its totient is φ = 806893440.

The previous prime is 827065787. The next prime is 827065853. The reversal of 827065817 is 718560728.

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 106894921 + 720170896 = 10339^2 + 26836^2 .

It is a cyclic number.

It is not a de Polignac number, because 827065817 - 2⁶ = 827065753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (827065417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10086128 + ... + 10086209.

It is an arithmetic number, because the mean of its divisors is an integer number (211809549).

Almost surely, 2^827065817 is an apocalyptic number.

It is an amenable number.

827065817 is a deficient number, since it is larger than the sum of its proper divisors (20172379).

827065817 is a wasteful number, since it uses less digits than its factorization.

827065817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20172378.

The product of its (nonzero) digits is 188160, while the sum is 44.

The square root of 827065817 is about 28758.7520069978. The cubic root of 827065817 is about 938.6709060828.

The spelling of 827065817 in words is "eight hundred twenty-seven million, sixty-five thousand, eight hundred seventeen".