834744821 has 4 divisors (see below), whose sum is σ = 834802944. Its totient is φ = 834686700.

The previous prime is 834744811. The next prime is 834744851. The reversal of 834744821 is 128447438.

It is a happy number.

834744821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 834744821 - 2¹⁰ = 834743797 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 (834744811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9836 + ... + 42026.

It is an arithmetic number, because the mean of its divisors is an integer number (208700736).

Almost surely, 2^834744821 is an apocalyptic number.

It is an amenable number.

834744821 is a deficient number, since it is larger than the sum of its proper divisors (58123).

834744821 is a wasteful number, since it uses less digits than its factorization.

834744821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58122.

The product of its digits is 172032, while the sum is 41.

The square root of 834744821 is about 28891.9507994874. The cubic root of 834744821 is about 941.5670334907.

The spelling of 834744821 in words is "eight hundred thirty-four million, seven hundred forty-four thousand, eight hundred twenty-one".