804434861 has 4 divisors (see below), whose sum is σ = 804961824. Its totient is φ = 803907900.

The previous prime is 804434791. The next prime is 804434923. The reversal of 804434861 is 168434408.

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 804434861 - 2¹⁴ = 804418477 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 (804494861) 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, 261185 + ... + 264246.

It is an arithmetic number, because the mean of its divisors is an integer number (201240456).

Almost surely, 2^804434861 is an apocalyptic number.

It is an amenable number.

804434861 is a deficient number, since it is larger than the sum of its proper divisors (526963).

804434861 is a wasteful number, since it uses less digits than its factorization.

804434861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526962.

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 804434861 is about 28362.5609034163. The cubic root of 804434861 is about 930.0300067398.

The spelling of 804434861 in words is "eight hundred four million, four hundred thirty-four thousand, eight hundred sixty-one".