834747665 has 8 divisors (see below), whose sum is σ = 1004197608. Its totient is φ = 666131200.

The previous prime is 834747593. The next prime is 834747677. The reversal of 834747665 is 566747438.

It is a Cunningham number, because it is equal to 28892²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 223323136 + 611424529 = 14944^2 + 24727^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 834747665 - 2⁸ = 834747409 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 206162 + ... + 210171.

It is an arithmetic number, because the mean of its divisors is an integer number (125524701).

Almost surely, 2^834747665 is an apocalyptic number.

It is an amenable number.

834747665 is a deficient number, since it is larger than the sum of its proper divisors (169449943).

834747665 is a wasteful number, since it uses less digits than its factorization.

834747665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416739.

The product of its digits is 3386880, while the sum is 50.

The square root of 834747665 is about 28892.0000173058. Note that the first 4 decimals coincide. The cubic root of 834747665 is about 941.5681028049.

The spelling of 834747665 in words is "eight hundred thirty-four million, seven hundred forty-seven thousand, six hundred sixty-five".