834821693 has 8 divisors (see below), whose sum is σ = 845299128. Its totient is φ = 824408064.

The previous prime is 834821683. The next prime is 834821699. The reversal of 834821693 is 396128438.

It can be written as a sum of positive squares in 4 ways, for example, as 59644729 + 775176964 = 7723^2 + 27842^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 834821693 - 2¹⁶ = 834756157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (834821699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10655 + ... + 42227.

It is an arithmetic number, because the mean of its divisors is an integer number (105662391).

Almost surely, 2^834821693 is an apocalyptic number.

It is an amenable number.

834821693 is a deficient number, since it is larger than the sum of its proper divisors (10477435).

834821693 is a wasteful number, since it uses less digits than its factorization.

834821693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31903.

The product of its digits is 248832, while the sum is 44.

The square root of 834821693 is about 28893.2811047828. The cubic root of 834821693 is about 941.5959357042.

The spelling of 834821693 in words is "eight hundred thirty-four million, eight hundred twenty-one thousand, six hundred ninety-three".