804122905 has 4 divisors (see below), whose sum is σ = 964947492. Its totient is φ = 643298320.

The previous prime is 804122903. The next prime is 804122911. The reversal of 804122905 is 509221408.

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 440496144 + 363626761 = 20988^2 + 19069^2 .

It is not a de Polignac number, because 804122905 - 2¹ = 804122903 is a prime.

It is a super-2 number, since 2×804122905² = 1293227292691278050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (804122903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80412286 + ... + 80412295.

It is an arithmetic number, because the mean of its divisors is an integer number (241236873).

Almost surely, 2^804122905 is an apocalyptic number.

It is an amenable number.

804122905 is a deficient number, since it is larger than the sum of its proper divisors (160824587).

804122905 is a wasteful number, since it uses less digits than its factorization.

804122905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160824586.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 804122905 is about 28357.0609372692. The cubic root of 804122905 is about 929.9097707968.

The spelling of 804122905 in words is "eight hundred four million, one hundred twenty-two thousand, nine hundred five".