804161409 has 4 divisors (see below), whose sum is σ = 1072215216. Its totient is φ = 536107604.

The previous prime is 804161401. The next prime is 804161411. The reversal of 804161409 is 904161408.

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.

It is a cyclic number.

It is not a de Polignac number, because 804161409 - 2³ = 804161401 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 804161409.

It is not an unprimeable number, because it can be changed into a prime (804161401) 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, 134026899 + ... + 134026904.

It is an arithmetic number, because the mean of its divisors is an integer number (268053804).

Almost surely, 2^804161409 is an apocalyptic number.

It is an amenable number.

804161409 is a deficient number, since it is larger than the sum of its proper divisors (268053807).

804161409 is a wasteful number, since it uses less digits than its factorization.

804161409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268053806.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 804161409 is about 28357.7398429423. The cubic root of 804161409 is about 929.9246129203.

Subtracting 804161409 from its reverse (904161408), we obtain a palindrome (99999999).

The spelling of 804161409 in words is "eight hundred four million, one hundred sixty-one thousand, four hundred nine".