804913605 has 80 divisors (see below), whose sum is σ = 1515283968. Its totient is φ = 408240000.

The previous prime is 804913579. The next prime is 804913607. The reversal of 804913605 is 506319408.

804913605 is a `hidden beast` number, since 8 + 0 + 49 + 1 + 3 + 605 = 666.

It is not a de Polignac number, because 804913605 - 2⁵ = 804913573 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 804913605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (804913607) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 765330 + ... + 766380.

Almost surely, 2^804913605 is an apocalyptic number.

It is an amenable number.

804913605 is a deficient number, since it is larger than the sum of its proper divisors (710370363).

804913605 is a wasteful number, since it uses less digits than its factorization.

804913605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160 (or 1151 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 804913605 is about 28370.9993655493. Note that the first 3 decimals coincide. The cubic root of 804913605 is about 930.2144666672.

Adding to 804913605 its sum of digits (36), we get a square (804913641 = 28371²).

The spelling of 804913605 in words is "eight hundred four million, nine hundred thirteen thousand, six hundred five".