804919513 has 4 divisors (see below), whose sum is σ = 805898368. Its totient is φ = 803940660.

The previous prime is 804919501. The next prime is 804919517. The reversal of 804919513 is 315919408.

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 a de Polignac number, because none of the positive numbers 2^k-804919513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (804919517) 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, 488193 + ... + 489838.

It is an arithmetic number, because the mean of its divisors is an integer number (201474592).

Almost surely, 2^804919513 is an apocalyptic number.

It is an amenable number.

804919513 is a deficient number, since it is larger than the sum of its proper divisors (978855).

804919513 is an equidigital number, since it uses as much as digits as its factorization.

804919513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978854.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 804919513 is about 28371.1034857652. The cubic root of 804919513 is about 930.2167425610.

The spelling of 804919513 in words is "eight hundred four million, nine hundred nineteen thousand, five hundred thirteen".