822134809 has 4 divisors (see below), whose sum is σ = 822646116. Its totient is φ = 821623504.

The previous prime is 822134801. The next prime is 822134827. The reversal of 822134809 is 908431228.

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 458088409 + 364046400 = 21403^2 + 19080^2 .

It is a cyclic number.

It is not a de Polignac number, because 822134809 - 2³ = 822134801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (822134801) 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, 253234 + ... + 256459.

It is an arithmetic number, because the mean of its divisors is an integer number (205661529).

Almost surely, 2^822134809 is an apocalyptic number.

It is an amenable number.

822134809 is a deficient number, since it is larger than the sum of its proper divisors (511307).

822134809 is a wasteful number, since it uses less digits than its factorization.

822134809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511306.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 822134809 is about 28672.8932791932. The cubic root of 822134809 is about 936.8017186985.

The spelling of 822134809 in words is "eight hundred twenty-two million, one hundred thirty-four thousand, eight hundred nine".