804922081 has 4 divisors (see below), whose sum is σ = 805041412. Its totient is φ = 804802752.

The previous prime is 804922067. The next prime is 804922123. The reversal of 804922081 is 180229408.

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 647193600 + 157728481 = 25440^2 + 12559^2 .

It is a cyclic number.

It is not a de Polignac number, because 804922081 - 2⁵ = 804922049 is a prime.

It is a super-2 number, since 2×804922081² = 1295799112962741122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (804922021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48900 + ... + 63253.

It is an arithmetic number, because the mean of its divisors is an integer number (201260353).

Almost surely, 2^804922081 is an apocalyptic number.

It is an amenable number.

804922081 is a deficient number, since it is larger than the sum of its proper divisors (119331).

804922081 is a wasteful number, since it uses less digits than its factorization.

804922081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119330.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 804922081 is about 28371.1487430453. The cubic root of 804922081 is about 930.2177318086.

The spelling of 804922081 in words is "eight hundred four million, nine hundred twenty-two thousand, eighty-one".