804078761 has 4 divisors (see below), whose sum is σ = 804142224. Its totient is φ = 804015300.

The previous prime is 804078749. The next prime is 804078787. The reversal of 804078761 is 167870408.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 804078761 - 2⁶ = 804078697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (804078731) 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, 5495 + ... + 40476.

It is an arithmetic number, because the mean of its divisors is an integer number (201035556).

Almost surely, 2^804078761 is an apocalyptic number.

It is an amenable number.

804078761 is a deficient number, since it is larger than the sum of its proper divisors (63463).

804078761 is a wasteful number, since it uses less digits than its factorization.

804078761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63462.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 804078761 is about 28356.2825666553. The cubic root of 804078761 is about 929.8927540415.

The spelling of 804078761 in words is "eight hundred four million, seventy-eight thousand, seven hundred sixty-one".