804509311 has 4 divisors (see below), whose sum is σ = 804655000. Its totient is φ = 804363624.

The previous prime is 804509273. The next prime is 804509327. The reversal of 804509311 is 113905408.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 804509311 - 2¹⁹ = 803985023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (804509371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64221 + ... + 75718.

It is an arithmetic number, because the mean of its divisors is an integer number (201163750).

Almost surely, 2^804509311 is an apocalyptic number.

804509311 is a deficient number, since it is larger than the sum of its proper divisors (145689).

804509311 is a wasteful number, since it uses less digits than its factorization.

804509311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145688.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 804509311 is about 28363.8733426872. The cubic root of 804509311 is about 930.0586971084.

The spelling of 804509311 in words is "eight hundred four million, five hundred nine thousand, three hundred eleven".